Temiskaming Shores
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Temiskaming Shores clear sky chart from 2005-11-06 to 2026-07-01.

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% 12% 4 10% 6% 5% 5% 4 5% 6% 29%	138131
	Night	14% 13% 5% 11% 6% 5% 5% 4 5% 6% 26%	134359
Transparency	Day	54% 7% 11% 19% 8% 1	141633
	Night	58% 6% 11% 17% 8% 1	138947
Seeing	Day	20% 14% 30% 23% 10% 3	17296
	Night	22% 10% 31% 27% 9% 1	26298

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	11% 20% 8% 16% 9% 7% 5% 4 4 5% 12%	4094
	11th to 20th	Day	9% 19% 8% 18% 8% 6% 5% 4 5% 5% 13%	4083
	21st to end	Day	7% 13% 8% 16% 8% 6% 6% 5% 6% 5% 19%	5621
February	1st to 10th	Day	6% 15% 7% 15% 9% 8% 6% 4 5% 5% 19%	1890
	11th to 20th	Day	9% 17% 5% 12% 8% 6% 6% 4 6% 6% 20%	1843
	21st to end	Day	12% 16% 5% 11% 7% 6% 5% 4 4 5% 24%	1557
March	1st to 10th	Day	17% 16% 5% 10% 5% 4 4 3 5% 5% 25%	4962
	11th to 20th	Day	14% 15% 5% 14% 7% 5% 4 3 4 5% 23%	5090
	21st to end	Day	13% 14% 7% 12% 6% 5% 5% 3 4 4 27%	5586
April	1st to 10th	Day	18% 15% 4 10% 6% 4 4 4 5% 6% 25%	2500
	11th to 20th	Day	20% 12% 4 9% 5% 4 4 4 4 6% 30%	2677
	21st to end	Day	20% 13% 4 7% 5% 4 3 3 4 5% 32%	2730
May	1st to 10th	Day	15% 12% 4 9% 6% 5% 5% 4 5% 6% 30%	7999
	11th to 20th	Day	14% 9% 3 8% 5% 5% 5% 4 5% 6% 36%	8221
	21st to end	Day	17% 9% 3 6% 4 4 4 3 5% 7% 37%	9231
June	1st to 10th	Day	18% 8% 3 7% 5% 4 6% 4 6% 8% 31%	3150
	11th to 20th	Day	14% 7% 3 6% 6% 6% 5% 5% 7% 7% 35%	3150
	21st to end	Day	16% 8% 3 7% 6% 6% 5% 4 6% 7% 31%	3150
July	1st to 10th	Day	15% 7% 2 7% 4 5% 6% 5% 7% 10% 32%	6820
	11th to 20th	Day	13% 5% 2 6% 5% 5% 5% 4 7% 10% 37%	6820
	21st to end	Day	11% 6% 2 6% 5% 5% 5% 4 7% 10% 38%	7072
August	1st to 10th	Day	11% 7% 3 8% 5% 6% 6% 4 7% 9% 35%	4234
	11th to 20th	Day	18% 7% 2 6% 4 5% 4 4 6% 8% 36%	4174
	21st to end	Day	11% 7% 3 8% 5% 5% 5% 4 5% 8% 39%	4611
September	1st to 10th	Day	16% 7% 2 7% 5% 5% 5% 4 5% 8% 35%	2400
	11th to 20th	Day	17% 8% 3 6% 5% 4 4 3 5% 7% 38%	2295
	21st to end	Day	20% 9% 3 8% 5% 4 4 3 5% 5% 33%	2155
October	1st to 10th	Day	18% 11% 4 8% 5% 4 5% 4 4 6% 32%	2000
	11th to 20th	Day	22% 16% 4 9% 6% 4 5% 3 4 4 23%	2000
	21st to end	Day	24% 17% 4 11% 5% 5% 5% 3 4 5% 17%	2105
November	1st to 10th	Day	19% 14% 5% 11% 6% 4 4 3 5% 5% 24%	1646
	11th to 20th	Day	17% 16% 5% 14% 8% 6% 5% 4 5% 5% 16%	1680
	21st to end	Day	21% 21% 6% 14% 8% 6% 4 3 4 4 11%	1680
December	1st to 10th	Day	12% 25% 9% 16% 8% 5% 4 3 4 3 10%	2661
	11th to 20th	Day	13% 18% 6% 13% 9% 5% 4 3 4 4 20%	2691
	21st to end	Day	18% 19% 7% 18% 7% 5% 4 4 4 4 11%	3553
January	1st to 10th	Night	9% 18% 8% 19% 9% 7% 6% 4 4 4 13%	8831
	11th to 20th	Night	9% 19% 7% 16% 8% 6% 6% 4 5% 5% 14%	8832
	21st to end	Night	6% 11% 7% 16% 9% 9% 7% 4 7% 6% 17%	8548
February	1st to 10th	Night	10% 15% 5% 12% 10% 7% 6% 5% 6% 6% 19%	2730
	11th to 20th	Night	10% 17% 6% 13% 7% 6% 6% 3 4 5% 23%	2663
	21st to end	Night	11% 14% 6% 13% 8% 7% 5% 4 4 6% 22%	2249
March	1st to 10th	Night	16% 17% 5% 10% 5% 4 5% 4 4 4 26%	5097
	11th to 20th	Night	15% 19% 6% 12% 6% 5% 4 3 4 5% 20%	5089
	21st to end	Night	16% 13% 5% 11% 5% 5% 4 3 4 5% 29%	5588
April	1st to 10th	Night	19% 15% 5% 9% 4 4 3 3 5% 5% 28%	2119
	11th to 20th	Night	18% 12% 4 8% 5% 4 4 4 5% 5% 32%	1909
	21st to end	Night	18% 9% 4 9% 4 4 4 3 5% 6% 34%	1890
May	1st to 10th	Night	13% 11% 3 9% 5% 5% 5% 4 5% 6% 31%	4899
	11th to 20th	Night	16% 8% 3 7% 5% 4 4 3 5% 7% 39%	4639
	21st to end	Night	16% 7% 3 6% 5% 4 4 3 5% 7% 39%	4948
June	1st to 10th	Night	17% 8% 2 7% 6% 5% 5% 5% 6% 6% 33%	1470
	11th to 20th	Night	17% 5% 2 5% 3 4 4 3 6% 8% 41%	1470
	21st to end	Night	14% 6% 2 8% 4 6% 5% 4 6% 8% 37%	1470
July	1st to 10th	Night	16% 7% 3 7% 5% 5% 4 4 6% 7% 37%	3160
	11th to 20th	Night	14% 5% 2 7% 5% 5% 5% 5% 6% 7% 40%	3160
	21st to end	Night	13% 5% 2 5% 4 4 4 4 6% 9% 45%	3786
August	1st to 10th	Night	8% 5% 3 7% 6% 5% 6% 5% 5% 10% 40%	2911
	11th to 20th	Night	15% 6% 2 7% 4 4 5% 4 7% 8% 40%	2875
	21st to end	Night	14% 6% 3 6% 4 4 4 3 5% 7% 44%	3253
September	1st to 10th	Night	16% 5% 2 6% 4 5% 4 4 6% 7% 41%	2000
	11th to 20th	Night	16% 7% 2 6% 4 4 4 3 4 6% 45%	2103
	21st to end	Night	19% 8% 2 6% 3 4 3 3 5% 7% 39%	2245
October	1st to 10th	Night	19% 11% 3 7% 5% 3 4 3 5% 7% 33%	2400
	11th to 20th	Night	23% 14% 3 9% 5% 5% 5% 5% 5% 5% 23%	2400
	21st to end	Night	21% 16% 4 9% 5% 4 5% 3 4 6% 23%	2732
November	1st to 10th	Night	17% 14% 4 8% 6% 5% 5% 4 5% 6% 25%	2872
	11th to 20th	Night	17% 16% 6% 12% 7% 6% 5% 2 4 5% 19%	2940
	21st to end	Night	20% 20% 6% 12% 6% 4 4 4 5% 5% 14%	2940
December	1st to 10th	Night	13% 22% 10% 16% 9% 6% 4 3 3 4 10%	4738
	11th to 20th	Night	14% 17% 6% 14% 8% 6% 5% 4 4 5% 18%	5736
	21st to end	Night	20% 20% 5% 15% 6% 4 4 3 3 4 15%	7667

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	75% 6% 8% 8% 2	4095
	11th to 20th	Day	72% 4 6% 10% 7%	4110
	21st to end	Day	62% 6% 8% 15% 8%	5621
February	1st to 10th	Day	65% 7% 8% 14% 6%	1890
	11th to 20th	Day	64% 6% 10% 13% 8%	1852
	21st to end	Day	61% 5% 8% 17% 8%	1557
March	1st to 10th	Day	60% 6% 8% 13% 12% 1	4965
	11th to 20th	Day	62% 6% 11% 13% 8%	5090
	21st to end	Day	59% 5% 8% 18% 9% 1	5586
April	1st to 10th	Day	58% 5% 10% 17% 9% 1	2500
	11th to 20th	Day	54% 6% 8% 21% 10% 1	2677
	21st to end	Day	54% 5% 7% 18% 13% 2	2730
May	1st to 10th	Day	51% 7% 8% 18% 13% 2	8008
	11th to 20th	Day	47% 7% 12% 22% 10% 2	8225
	21st to end	Day	45% 6% 11% 23% 14% 2	9232
June	1st to 10th	Day	50% 7% 12% 20% 11% 1	3150
	11th to 20th	Day	45% 8% 12% 22% 13% 1	3150
	21st to end	Day	49% 8% 12% 20% 9% 1	3150
July	1st to 10th	Day	43% 7% 17% 27% 5%	6747
	11th to 20th	Day	39% 8% 19% 28% 6%	6739
	21st to end	Day	39% 7% 15% 31% 7%	6871
August	1st to 10th	Day	42% 9% 17% 27% 6%	4221
	11th to 20th	Day	43% 8% 16% 25% 8% 1	4213
	21st to end	Day	41% 8% 14% 29% 7% 2	4611
September	1st to 10th	Day	46% 9% 15% 22% 8%	2400
	11th to 20th	Day	45% 7% 16% 25% 6%	2295
	21st to end	Day	52% 7% 13% 21% 7%	2155
October	1st to 10th	Day	53% 6% 12% 24% 5%	3260
	11th to 20th	Day	57% 6% 10% 19% 8%	3240
	21st to end	Day	65% 6% 15% 9% 5%	3382
November	1st to 10th	Day	62% 6% 14% 13% 5%	1646
	11th to 20th	Day	69% 7% 9% 11% 4	1680
	21st to end	Day	79% 5% 7% 7% 2	1680
December	1st to 10th	Day	78% 6% 7% 7% 2	2661
	11th to 20th	Day	67% 6% 8% 16% 3	2691
	21st to end	Day	76% 5% 7% 10% 3	3553
January	1st to 10th	Night	73% 6% 8% 9% 3	8831
	11th to 20th	Night	71% 5% 8% 10% 7%	8880
	21st to end	Night	64% 5% 7% 16% 7%	8548
February	1st to 10th	Night	64% 6% 9% 13% 8% 1	2730
	11th to 20th	Night	64% 5% 11% 13% 6%	2665
	21st to end	Night	62% 6% 9% 15% 7% 1	2249
March	1st to 10th	Night	60% 5% 9% 13% 9% 3	5107
	11th to 20th	Night	66% 5% 11% 12% 6% 1	5090
	21st to end	Night	58% 4 8% 16% 11% 3	5588
April	1st to 10th	Night	59% 4 9% 17% 11% 1	2119
	11th to 20th	Night	52% 5% 8% 19% 15% 2	1909
	21st to end	Night	51% 6% 9% 16% 16% 2	1890
May	1st to 10th	Night	49% 8% 8% 21% 14% 1	4906
	11th to 20th	Night	44% 7% 13% 21% 13% 2	4640
	21st to end	Night	42% 6% 10% 25% 15% 2	4949
June	1st to 10th	Night	49% 7% 10% 20% 11% 3	1470
	11th to 20th	Night	39% 7% 13% 24% 15% 2	1470
	21st to end	Night	43% 8% 12% 23% 12% 1	1470
July	1st to 10th	Night	45% 6% 13% 27% 9%	3125
	11th to 20th	Night	40% 8% 15% 28% 9%	3118
	21st to end	Night	36% 7% 16% 30% 11%	3673
August	1st to 10th	Night	38% 8% 16% 30% 8%	2901
	11th to 20th	Night	41% 8% 16% 29% 6%	2902
	21st to end	Night	39% 7% 15% 27% 10% 2	3253
September	1st to 10th	Night	42% 8% 17% 24% 9% 2	2000
	11th to 20th	Night	42% 6% 17% 28% 8%	2103
	21st to end	Night	44% 7% 15% 25% 8%	2245
October	1st to 10th	Night	48% 7% 12% 23% 10%	3920
	11th to 20th	Night	56% 6% 13% 19% 6%	3899
	21st to end	Night	57% 8% 17% 12% 6%	4405
November	1st to 10th	Night	58% 7% 14% 16% 4	2872
	11th to 20th	Night	68% 6% 12% 11% 4	2940
	21st to end	Night	73% 7% 10% 8% 2	2940
December	1st to 10th	Night	78% 6% 6% 8% 2	4738
	11th to 20th	Night	69% 6% 8% 11% 6%	5735
	21st to end	Night	74% 4 6% 13% 3	7667

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	20% 16% 38% 20% 6%	220
	11th to 20th	Day	17% 19% 33% 21% 9% 1	220
	21st to end	Day	18% 10% 36% 24% 11% 1	352
February	1st to 10th	Day	19% 23% 36% 16% 5% 1	330
	11th to 20th	Day	18% 20% 38% 18% 5%	330
	21st to end	Day	25% 24% 33% 14% 4	273
March	1st to 10th	Day	18% 18% 38% 19% 6%	503
	11th to 20th	Day	22% 19% 31% 21% 6%	540
	21st to end	Day	23% 18% 33% 18% 7% 1	594
April	1st to 10th	Day	24% 16% 30% 21% 8% 1	540
	11th to 20th	Day	29% 16% 25% 19% 8% 4	532
	21st to end	Day	29% 17% 25% 17% 10% 3	540
May	1st to 10th	Day	23% 11% 29% 25% 10% 3	543
	11th to 20th	Day	20% 13% 32% 22% 11% 3	567
	21st to end	Day	21% 13% 30% 23% 11% 1	671
June	1st to 10th	Day	19% 12% 32% 26% 9% 2	780
	11th to 20th	Day	16% 14% 30% 26% 11% 2	780
	21st to end	Day	18% 9% 27% 29% 12% 4	780
July	1st to 10th	Day	15% 9% 30% 29% 14% 3	722
	11th to 20th	Day	14% 11% 31% 26% 16% 2	718
	21st to end	Day	11% 10% 27% 32% 16% 5%	644
August	1st to 10th	Day	13% 8% 29% 28% 18% 5%	526
	11th to 20th	Day	15% 7% 24% 27% 18% 10%	519
	21st to end	Day	16% 12% 26% 23% 14% 9%	583
September	1st to 10th	Day	19% 8% 29% 25% 15% 4	530
	11th to 20th	Day	18% 9% 22% 30% 13% 7%	530
	21st to end	Day	24% 10% 25% 22% 15% 4	530
October	1st to 10th	Day	24% 14% 27% 21% 12% 2	530
	11th to 20th	Day	28% 19% 32% 17% 4 1	530
	21st to end	Day	29% 16% 32% 18% 4 1	497
November	1st to 10th	Day	32% 16% 38% 11% 3	220
	11th to 20th	Day	23% 21% 31% 19% 5%	220
	21st to end	Day	33% 18% 34% 10% 5% 1	220
December	1st to 10th	Day	20% 19% 34% 21% 6%	220
	11th to 20th	Day	26% 16% 32% 17% 8% 1	220
	21st to end	Day	24% 16% 35% 17% 5% 2	242
January	1st to 10th	Night	22% 11% 35% 25% 6%	1050
	11th to 20th	Night	24% 11% 31% 26% 7%	1050
	21st to end	Night	17% 9% 31% 31% 12% 1	961
February	1st to 10th	Night	19% 12% 35% 26% 8%	840
	11th to 20th	Night	20% 11% 35% 28% 5%	823
	21st to end	Night	18% 15% 35% 24% 7%	692
March	1st to 10th	Night	21% 13% 37% 24% 5%	840
	11th to 20th	Night	23% 13% 34% 23% 6%	840
	21st to end	Night	20% 12% 35% 26% 6% 1	924
April	1st to 10th	Night	26% 12% 29% 27% 6%	840
	11th to 20th	Night	24% 13% 29% 25% 8% 1	665
	21st to end	Night	22% 11% 28% 31% 6% 1	630
May	1st to 10th	Night	18% 8% 31% 35% 9%	504
	11th to 20th	Night	21% 9% 29% 32% 9% 1	414
	21st to end	Night	20% 7% 31% 36% 5%	455
June	1st to 10th	Night	18% 10% 30% 35% 8%	420
	11th to 20th	Night	19% 7% 31% 32% 11%	420
	21st to end	Night	16% 6% 28% 35% 15% 1	420
July	1st to 10th	Night	15% 4 29% 41% 10%	390
	11th to 20th	Night	16% 5% 24% 41% 13%	388
	21st to end	Night	14% 6% 23% 42% 14% 1	438
August	1st to 10th	Night	12% 5% 26% 36% 19% 2	593
	11th to 20th	Night	15% 6% 20% 37% 20% 2	594
	21st to end	Night	20% 6% 25% 30% 17% 2	677
September	1st to 10th	Night	19% 6% 29% 30% 14% 1	800
	11th to 20th	Night	19% 7% 27% 27% 20% 2	800
	21st to end	Night	21% 8% 26% 29% 14% 2	800
October	1st to 10th	Night	25% 8% 32% 25% 10% 1	800
	11th to 20th	Night	29% 14% 29% 21% 7% 1	800
	21st to end	Night	30% 10% 30% 24% 6% 1	880
November	1st to 10th	Night	25% 13% 33% 22% 6%	820
	11th to 20th	Night	25% 17% 32% 20% 6%	840
	21st to end	Night	32% 13% 32% 19% 4	840
December	1st to 10th	Night	27% 13% 33% 20% 7% 1	845
	11th to 20th	Night	26% 13% 31% 24% 5% 1	1050
	21st to end	Night	29% 12% 28% 23% 8% 1	1155

Page generated at 2026-06-28 02:10:45. Version ac07

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