Ingonish Beach
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Ingonish Beach clear sky chart from 2005-11-06 to 2026-04-02.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	15% 10% 4 9% 6% 5% 5% 4 6% 7% 27%	131627
	Night	15% 10% 4 10% 6% 5% 5% 4 6% 7% 27%	130447
Transparency	Day	54% 8% 13% 18% 7%	135078
	Night	56% 9% 11% 17% 6% 1	135094
Seeing	Day	22% 13% 29% 25% 9% 1	19584
	Night	23% 15% 28% 24% 8% 1	27065

By Month

Percentage Cloud Cover NE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	10% 13% 7% 14% 8% 6% 6% 5% 8% 7% 16%	4690
	11th to 20th	Day	13% 12% 7% 16% 8% 6% 7% 4 6% 6% 15%	4681
	21st to end	Day	7% 7% 5% 15% 11% 11% 6% 5% 6% 6% 20%	5174
February	1st to 10th	Day	12% 12% 4 15% 10% 8% 7% 5% 7% 6% 14%	1890
	11th to 20th	Day	10% 13% 4 11% 9% 6% 6% 6% 6% 7% 21%	1843
	21st to end	Day	7% 12% 5% 12% 7% 6% 5% 5% 5% 7% 29%	1730
March	1st to 10th	Day	15% 12% 4 10% 8% 6% 6% 3 5% 6% 25%	4574
	11th to 20th	Day	10% 15% 6% 12% 7% 6% 5% 5% 6% 7% 22%	5014
	21st to end	Day	17% 16% 5% 14% 6% 6% 5% 4 6% 6% 15%	5951
April	1st to 10th	Day	17% 13% 4 11% 6% 5% 6% 4 6% 6% 23%	2412
	11th to 20th	Day	18% 10% 3 8% 5% 4 4 3 5% 6% 34%	2374
	21st to end	Day	21% 11% 3 7% 5% 4 4 3 5% 7% 29%	2608
May	1st to 10th	Day	19% 13% 3 7% 4 4 4 3 5% 8% 28%	6345
	11th to 20th	Day	19% 9% 2 7% 4 4 4 3 6% 8% 33%	6318
	21st to end	Day	15% 10% 3 7% 4 4 4 4 6% 7% 35%	6948
June	1st to 10th	Day	24% 9% 3 7% 5% 4 5% 3 6% 8% 26%	2800
	11th to 20th	Day	16% 8% 2 6% 4 5% 4 5% 6% 8% 35%	2800
	21st to end	Day	21% 11% 3 9% 6% 5% 5% 4 6% 4 28%	2800
July	1st to 10th	Day	15% 9% 3 8% 6% 6% 6% 5% 6% 10% 27%	6360
	11th to 20th	Day	12% 5% 2 7% 5% 5% 5% 4 6% 8% 40%	6360
	21st to end	Day	11% 5% 2 6% 5% 5% 5% 4 7% 10% 41%	6927
August	1st to 10th	Day	14% 6% 3 6% 6% 6% 7% 6% 8% 9% 29%	4564
	11th to 20th	Day	18% 7% 2 7% 4 4 5% 4 6% 8% 33%	4189
	21st to end	Day	12% 7% 2 6% 5% 5% 5% 4 6% 8% 39%	4312
September	1st to 10th	Day	15% 6% 3 6% 5% 4 4 4 6% 8% 39%	2400
	11th to 20th	Day	17% 8% 2 6% 5% 5% 5% 3 6% 8% 35%	2387
	21st to end	Day	17% 6% 2 6% 5% 4 5% 5% 7% 8% 36%	2154
October	1st to 10th	Day	16% 8% 3 7% 5% 5% 5% 3 7% 8% 33%	2000
	11th to 20th	Day	18% 11% 3 7% 5% 5% 6% 4 6% 8% 26%	2000
	21st to end	Day	20% 13% 4 10% 6% 7% 6% 4 5% 6% 21%	1995
November	1st to 10th	Day	17% 15% 5% 11% 6% 6% 5% 4 6% 7% 20%	1831
	11th to 20th	Day	19% 17% 6% 11% 7% 7% 6% 5% 5% 5% 13%	1680
	21st to end	Day	16% 15% 6% 10% 7% 7% 5% 5% 7% 8% 14%	1680
December	1st to 10th	Day	12% 13% 6% 12% 6% 7% 7% 4 7% 7% 19%	2690
	11th to 20th	Day	25% 11% 4 13% 5% 5% 5% 4 6% 6% 16%	3076
	21st to end	Day	18% 11% 6% 17% 9% 7% 6% 4 5% 4 13%	4070
January	1st to 10th	Night	11% 11% 4 16% 9% 6% 6% 5% 7% 8% 15%	8234
	11th to 20th	Night	16% 10% 6% 19% 7% 6% 5% 4 6% 6% 15%	8234
	21st to end	Night	6% 8% 4 12% 14% 11% 7% 6% 7% 8% 17%	9019
February	1st to 10th	Night	13% 11% 4 14% 8% 6% 7% 5% 8% 7% 17%	2730
	11th to 20th	Night	12% 11% 4 9% 7% 6% 6% 5% 6% 8% 24%	2663
	21st to end	Night	8% 11% 5% 10% 8% 6% 6% 5% 6% 8% 28%	2076
March	1st to 10th	Night	16% 11% 3 9% 8% 5% 5% 4 6% 6% 27%	5486
	11th to 20th	Night	13% 13% 4 11% 7% 5% 5% 4 5% 6% 26%	5149
	21st to end	Night	20% 13% 4 11% 6% 6% 5% 4 5% 5% 21%	5223
April	1st to 10th	Night	19% 12% 2 8% 5% 3 5% 4 6% 6% 28%	2011
	11th to 20th	Night	16% 10% 4 7% 4 4 5% 3 5% 6% 36%	1976
	21st to end	Night	21% 11% 2 6% 5% 4 5% 3 5% 5% 32%	1788
May	1st to 10th	Night	19% 12% 3 6% 4 3 4 4 6% 9% 29%	3615
	11th to 20th	Night	17% 8% 3 6% 3 3 4 4 6% 9% 38%	3596
	21st to end	Night	12% 9% 3 7% 5% 4 4 4 7% 8% 37%	3948
June	1st to 10th	Night	27% 10% 2 7% 5% 4 5% 4 5% 6% 26%	1600
	11th to 20th	Night	18% 7% 2 6% 3 3 4 3 6% 7% 42%	1600
	21st to end	Night	22% 7% 3 7% 5% 4 4 4 5% 6% 33%	1600
July	1st to 10th	Night	15% 7% 3 8% 6% 6% 7% 5% 8% 9% 26%	3619
	11th to 20th	Night	11% 6% 2 6% 4 4 4 4 6% 9% 44%	3620
	21st to end	Night	16% 5% 2 5% 4 4 4 4 7% 8% 40%	3948
August	1st to 10th	Night	11% 5% 3 7% 6% 6% 7% 5% 8% 9% 35%	2596
	11th to 20th	Night	13% 6% 3 7% 4 6% 5% 3 6% 9% 38%	2843
	21st to end	Night	12% 6% 2 5% 3 4 4 4 6% 8% 47%	3586
September	1st to 10th	Night	14% 5% 2 5% 5% 4 4 4 5% 8% 44%	2000
	11th to 20th	Night	17% 6% 1 4 4 4 5% 4 6% 8% 42%	2012
	21st to end	Night	17% 7% 2 6% 4 4 4 4 5% 7% 40%	2243
October	1st to 10th	Night	16% 7% 2 6% 4 5% 5% 4 6% 8% 36%	2400
	11th to 20th	Night	20% 7% 2 7% 5% 4 5% 4 6% 8% 31%	2400
	21st to end	Night	22% 10% 3 7% 5% 6% 5% 4 6% 8% 24%	2845
November	1st to 10th	Night	16% 11% 3 9% 6% 6% 6% 5% 7% 7% 24%	2684
	11th to 20th	Night	21% 12% 4 10% 7% 6% 5% 5% 7% 7% 16%	2940
	21st to end	Night	19% 13% 4 10% 5% 5% 6% 4 7% 8% 17%	2940
December	1st to 10th	Night	13% 11% 5% 13% 6% 5% 5% 4 5% 8% 25%	4720
	11th to 20th	Night	20% 12% 5% 11% 5% 5% 5% 4 7% 7% 19%	5353
	21st to end	Night	20% 11% 5% 14% 6% 5% 4 4 5% 6% 20%	7150

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	66% 10% 8% 13% 4	4691
	11th to 20th	Day	67% 10% 10% 9% 4	4710
	21st to end	Day	63% 8% 8% 15% 5% 1	5174
February	1st to 10th	Day	67% 10% 10% 9% 3	1890
	11th to 20th	Day	58% 14% 13% 11% 3 1	1851
	21st to end	Day	51% 10% 13% 17% 8% 2	1730
March	1st to 10th	Day	60% 5% 9% 14% 12% 1	4578
	11th to 20th	Day	56% 12% 14% 14% 4	5014
	21st to end	Day	66% 7% 7% 14% 5% 1	5951
April	1st to 10th	Day	57% 9% 12% 14% 7% 2	2412
	11th to 20th	Day	49% 7% 11% 20% 11% 1	2374
	21st to end	Day	53% 8% 13% 16% 9% 1	2608
May	1st to 10th	Day	55% 10% 12% 16% 6% 1	6357
	11th to 20th	Day	49% 9% 15% 19% 9%	6322
	21st to end	Day	45% 10% 14% 22% 8%	6948
June	1st to 10th	Day	56% 10% 11% 16% 6% 1	2800
	11th to 20th	Day	46% 9% 14% 21% 9% 1	2800
	21st to end	Day	58% 9% 9% 14% 9% 1	2800
July	1st to 10th	Day	56% 5% 17% 15% 7%	6290
	11th to 20th	Day	41% 6% 19% 27% 6% 1	6284
	21st to end	Day	39% 6% 21% 26% 7%	6730
August	1st to 10th	Day	50% 10% 16% 18% 6%	4550
	11th to 20th	Day	47% 7% 16% 25% 5%	4229
	21st to end	Day	41% 7% 14% 27% 10%	4312
September	1st to 10th	Day	40% 11% 16% 24% 10% 1	2400
	11th to 20th	Day	46% 8% 15% 22% 8% 1	2387
	21st to end	Day	42% 11% 13% 23% 9% 1	2154
October	1st to 10th	Day	55% 6% 12% 19% 8%	3260
	11th to 20th	Day	50% 7% 12% 24% 8%	3240
	21st to end	Day	53% 6% 13% 21% 7%	3206
November	1st to 10th	Day	63% 9% 13% 13% 3	1831
	11th to 20th	Day	70% 9% 10% 8% 3	1680
	21st to end	Day	64% 13% 12% 9% 2	1680
December	1st to 10th	Day	64% 7% 6% 17% 6%	2690
	11th to 20th	Day	70% 7% 10% 9% 4	3075
	21st to end	Day	72% 10% 8% 7% 2	4070
January	1st to 10th	Night	66% 12% 8% 11% 3	8234
	11th to 20th	Night	71% 10% 8% 9% 2	8280
	21st to end	Night	63% 9% 8% 13% 5%	9019
February	1st to 10th	Night	65% 11% 10% 9% 4	2730
	11th to 20th	Night	58% 11% 13% 14% 4 1	2666
	21st to end	Night	53% 12% 11% 14% 8% 1	2076
March	1st to 10th	Night	58% 7% 6% 15% 11% 3	5495
	11th to 20th	Night	58% 7% 14% 13% 8% 1	5150
	21st to end	Night	66% 6% 6% 14% 6% 1	5223
April	1st to 10th	Night	55% 8% 10% 15% 11% 1	2011
	11th to 20th	Night	48% 9% 10% 21% 11% 2	1976
	21st to end	Night	53% 8% 10% 15% 11% 2	1788
May	1st to 10th	Night	54% 10% 13% 16% 7%	3620
	11th to 20th	Night	45% 9% 13% 24% 8% 1	3597
	21st to end	Night	43% 11% 14% 24% 8% 1	3949
June	1st to 10th	Night	60% 7% 10% 16% 7% 1	1600
	11th to 20th	Night	41% 8% 13% 23% 13% 1	1600
	21st to end	Night	52% 9% 13% 16% 10%	1600
July	1st to 10th	Night	55% 5% 16% 18% 6%	3581
	11th to 20th	Night	38% 6% 20% 22% 13% 1	3572
	21st to end	Night	44% 5% 18% 25% 7%	3831
August	1st to 10th	Night	45% 9% 18% 22% 6%	2585
	11th to 20th	Night	45% 7% 20% 24% 4	2868
	21st to end	Night	38% 7% 14% 33% 9%	3585
September	1st to 10th	Night	38% 12% 14% 25% 11%	2000
	11th to 20th	Night	40% 10% 15% 24% 10% 1	2012
	21st to end	Night	43% 9% 13% 26% 9%	2243
October	1st to 10th	Night	51% 6% 12% 20% 11%	3920
	11th to 20th	Night	47% 7% 10% 27% 8%	3899
	21st to end	Night	53% 6% 11% 24% 6%	4595
November	1st to 10th	Night	58% 12% 14% 12% 4	2684
	11th to 20th	Night	67% 11% 10% 9% 2	2940
	21st to end	Night	64% 14% 11% 8% 2	2940
December	1st to 10th	Night	60% 7% 7% 19% 6%	4720
	11th to 20th	Night	68% 7% 8% 13% 4	5355
	21st to end	Night	68% 8% 9% 14% 1	7150

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	23% 23% 31% 19% 4	430
	11th to 20th	Day	25% 23% 30% 16% 6% 1	430
	21st to end	Day	14% 23% 41% 18% 3	473
February	1st to 10th	Day	23% 22% 33% 17% 5%	430
	11th to 20th	Day	19% 27% 31% 18% 3 1	426
	21st to end	Day	17% 17% 38% 22% 5% 1	355
March	1st to 10th	Day	18% 20% 39% 18% 5%	430
	11th to 20th	Day	14% 18% 38% 22% 7% 1	521
	21st to end	Day	24% 18% 32% 18% 6% 2	594
April	1st to 10th	Day	28% 22% 32% 13% 5%	504
	11th to 20th	Day	24% 16% 32% 20% 7%	492
	21st to end	Day	27% 12% 29% 23% 7% 1	606
May	1st to 10th	Day	27% 14% 29% 22% 6% 3	703
	11th to 20th	Day	22% 10% 25% 27% 14% 2	724
	21st to end	Day	19% 12% 31% 27% 9% 2	790
June	1st to 10th	Day	29% 8% 26% 27% 10% 1	730
	11th to 20th	Day	17% 7% 28% 35% 11% 2	730
	21st to end	Day	26% 5% 25% 29% 14% 2	730
July	1st to 10th	Day	21% 4 24% 36% 13% 1	720
	11th to 20th	Day	16% 5% 22% 41% 14% 2	718
	21st to end	Day	21% 4 22% 35% 17% 1	795
August	1st to 10th	Day	15% 4 20% 39% 20% 2	725
	11th to 20th	Day	18% 6% 23% 29% 21% 4	553
	21st to end	Day	14% 7% 27% 36% 14% 3	583
September	1st to 10th	Day	16% 7% 30% 35% 10% 3	530
	11th to 20th	Day	23% 11% 28% 23% 12% 2	522
	21st to end	Day	20% 10% 34% 24% 12% 1	420
October	1st to 10th	Day	20% 11% 31% 23% 14%	420
	11th to 20th	Day	24% 13% 28% 21% 12% 2	420
	21st to end	Day	27% 17% 29% 20% 6%	462
November	1st to 10th	Day	28% 20% 27% 19% 4 1	425
	11th to 20th	Day	33% 18% 29% 14% 5%	430
	21st to end	Day	31% 22% 26% 17% 3	430
December	1st to 10th	Day	29% 20% 33% 15% 3	430
	11th to 20th	Day	30% 24% 30% 13% 2	430
	21st to end	Day	24% 26% 29% 15% 5% 1	473
January	1st to 10th	Night	23% 26% 30% 17% 4	950
	11th to 20th	Night	24% 23% 32% 16% 4 1	950
	21st to end	Night	17% 23% 37% 18% 5%	1039
February	1st to 10th	Night	23% 18% 34% 20% 4 1	840
	11th to 20th	Night	21% 24% 33% 18% 4 1	823
	21st to end	Night	16% 17% 34% 26% 7%	692
March	1st to 10th	Night	21% 16% 36% 23% 4	840
	11th to 20th	Night	19% 16% 31% 25% 7% 1	840
	21st to end	Night	26% 15% 30% 23% 5% 1	767
April	1st to 10th	Night	27% 15% 30% 23% 5%	604
	11th to 20th	Night	22% 14% 27% 29% 8%	594
	21st to end	Night	27% 11% 28% 23% 10% 1	600
May	1st to 10th	Night	30% 7% 25% 24% 11% 4	600
	11th to 20th	Night	21% 8% 24% 29% 15% 3	592
	21st to end	Night	20% 9% 29% 31% 11% 1	649
June	1st to 10th	Night	31% 8% 25% 28% 7% 1	600
	11th to 20th	Night	21% 5% 24% 35% 14% 2	600
	21st to end	Night	27% 3 24% 34% 11% 2	600
July	1st to 10th	Night	18% 5% 19% 38% 19% 1	586
	11th to 20th	Night	16% 5% 18% 43% 18%	582
	21st to end	Night	23% 3 18% 39% 16% 2	656
August	1st to 10th	Night	16% 2 21% 39% 20% 3	598
	11th to 20th	Night	19% 5% 19% 35% 18% 4	592
	21st to end	Night	17% 3 22% 38% 19% 2	660
September	1st to 10th	Night	16% 7% 30% 33% 13% 2	600
	11th to 20th	Night	22% 10% 25% 29% 14% 1	600
	21st to end	Night	22% 10% 28% 29% 9% 1	643
October	1st to 10th	Night	21% 11% 30% 27% 11% 1	800
	11th to 20th	Night	26% 12% 25% 25% 11% 1	800
	21st to end	Night	31% 15% 29% 20% 5% 1	993
November	1st to 10th	Night	25% 19% 31% 20% 4 1	930
	11th to 20th	Night	31% 22% 26% 15% 5% 1	950
	21st to end	Night	32% 19% 31% 15% 3	950
December	1st to 10th	Night	28% 22% 30% 14% 5%	950
	11th to 20th	Night	29% 27% 29% 12% 3 1	950
	21st to end	Night	24% 24% 32% 16% 3 1	1045

Page generated at 2026-03-30 03:18:43. Version ac07

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