Hearts Content Scenic Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Hearts Content Scenic Area clear sky chart from 2005-11-06 to 2024-11-05.

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	18% 12% 4 9% 5% 4 4 4 5% 7% 29%	101330
	Night	18% 13% 5% 9% 5% 4 4 3 5% 6% 29%	97708
Transparency	Day	54% 6% 11% 19% 9% 1	104936
	Night	55% 6% 11% 17% 9% 1	102190
Seeing	Day	26% 16% 28% 18% 9% 3	14630
	Night	25% 15% 27% 23% 10% 1	24130

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	18% 24% 11% 13% 5% 3 3 2 3 4 13%	2590
	11th to 20th	Day	12% 23% 9% 18% 9% 3 3 2 3 3 15%	2840
	21st to end	Day	25% 19% 10% 17% 6% 4 3 2 3 3 9%	3124
February	1st to 10th	Day	18% 21% 6% 13% 8% 6% 4 2 2 4 17%	1710
	11th to 20th	Day	15% 15% 8% 16% 8% 4 4 3 4 5% 18%	1663
	21st to end	Day	19% 17% 4 12% 6% 4 3 2 5% 6% 22%	1524
March	1st to 10th	Day	21% 12% 7% 9% 4 3 3 3 4 6% 28%	3432
	11th to 20th	Day	12% 19% 7% 10% 5% 4 3 3 4 6% 28%	3480
	21st to end	Day	20% 13% 3 11% 5% 3 3 3 5% 6% 29%	3815
April	1st to 10th	Day	17% 17% 4 7% 5% 4 3 2 5% 6% 29%	2237
	11th to 20th	Day	20% 14% 3 7% 3 4 5% 3 4 5% 32%	2261
	21st to end	Day	22% 12% 3 6% 4 3 4 3 4 5% 33%	2470
May	1st to 10th	Day	25% 9% 3 8% 5% 4 4 3 4 6% 29%	4108
	11th to 20th	Day	20% 10% 3 8% 5% 5% 5% 4 6% 7% 26%	4233
	21st to end	Day	13% 6% 2 6% 5% 4 6% 4 6% 7% 40%	4837
June	1st to 10th	Day	18% 8% 2 7% 6% 4 5% 4 6% 8% 33%	2660
	11th to 20th	Day	16% 7% 2 7% 6% 5% 5% 5% 6% 8% 33%	2660
	21st to end	Day	18% 7% 3 5% 5% 5% 4 4 6% 9% 35%	2660
July	1st to 10th	Day	11% 6% 2 6% 6% 5% 6% 5% 7% 10% 37%	4440
	11th to 20th	Day	14% 6% 2 6% 5% 5% 5% 5% 7% 9% 37%	4286
	21st to end	Day	12% 6% 3 7% 5% 6% 6% 5% 6% 8% 37%	4466
August	1st to 10th	Day	19% 7% 2 8% 5% 5% 5% 4 6% 8% 30%	4104
	11th to 20th	Day	15% 8% 3 7% 5% 6% 6% 6% 7% 9% 27%	4044
	21st to end	Day	14% 6% 2 6% 4 4 6% 5% 6% 9% 36%	4282
September	1st to 10th	Day	20% 8% 2 6% 3 4 4 3 5% 7% 39%	2280
	11th to 20th	Day	14% 7% 3 7% 5% 4 5% 3 5% 8% 39%	2167
	21st to end	Day	21% 8% 3 8% 4 5% 4 3 6% 7% 31%	2047
October	1st to 10th	Day	19% 8% 3 7% 4 4 4 4 5% 8% 33%	1900
	11th to 20th	Day	22% 11% 3 8% 5% 4 4 3 5% 5% 31%	1900
	21st to end	Day	25% 13% 3 8% 5% 4 4 3 4 5% 25%	2090
November	1st to 10th	Day	14% 13% 4 8% 5% 4 4 3 5% 7% 34%	1782
	11th to 20th	Day	18% 18% 4 9% 5% 4 4 4 5% 5% 24%	1520
	21st to end	Day	22% 23% 6% 7% 4 4 3 4 4 6% 18%	1520
December	1st to 10th	Day	19% 28% 8% 13% 4 3 3 3 3 3 12%	1520
	11th to 20th	Day	18% 22% 8% 13% 5% 4 3 3 4 5% 16%	1906
	21st to end	Day	26% 25% 8% 11% 4 3 3 3 3 3 12%	2772
January	1st to 10th	Night	16% 23% 11% 16% 5% 4 3 2 3 4 12%	4351
	11th to 20th	Night	15% 20% 10% 18% 6% 5% 5% 3 3 4 11%	4120
	21st to end	Night	25% 20% 8% 16% 6% 4 3 2 2 3 12%	4532
February	1st to 10th	Night	18% 19% 6% 12% 10% 5% 4 3 3 3 18%	2470
	11th to 20th	Night	16% 15% 7% 15% 8% 6% 5% 3 4 5% 18%	2403
	21st to end	Night	21% 13% 6% 14% 6% 4 4 3 3 4 21%	1923
March	1st to 10th	Night	22% 15% 4 9% 5% 3 3 2 3 5% 28%	3408
	11th to 20th	Night	18% 18% 9% 7% 4 3 3 3 4 5% 27%	3479
	21st to end	Night	17% 12% 4 9% 4 3 3 2 4 4 36%	3817
April	1st to 10th	Night	19% 16% 4 6% 4 3 4 3 5% 6% 29%	1943
	11th to 20th	Night	19% 10% 4 6% 5% 3 5% 3 4 6% 35%	1875
	21st to end	Night	16% 12% 3 7% 4 4 5% 4 5% 8% 33%	1720
May	1st to 10th	Night	27% 10% 2 6% 3 3 4 3 4 6% 31%	2833
	11th to 20th	Night	20% 11% 3 6% 5% 4 4 3 5% 6% 33%	2659
	21st to end	Night	15% 6% 2 6% 3 4 4 3 6% 10% 41%	2738
June	1st to 10th	Night	13% 6% 2 7% 5% 5% 5% 4 7% 8% 40%	1520
	11th to 20th	Night	13% 6% 3 6% 5% 4 4 4 6% 9% 40%	1520
	21st to end	Night	15% 7% 3 6% 3 4 4 3 7% 9% 41%	1520
July	1st to 10th	Night	14% 8% 3 7% 5% 4 4 3 5% 7% 39%	2520
	11th to 20th	Night	12% 8% 1 5% 4 4 3 3 6% 9% 45%	2670
	21st to end	Night	13% 6% 2 6% 5% 4 6% 4 6% 8% 42%	3087
August	1st to 10th	Night	15% 9% 3 7% 4 4 5% 4 6% 7% 37%	2825
	11th to 20th	Night	19% 8% 2 5% 4 4 4 4 5% 6% 39%	2785
	21st to end	Night	11% 5% 2 5% 4 4 4 4 6% 8% 45%	3340
September	1st to 10th	Night	14% 8% 2 5% 4 4 4 4 4 7% 45%	1900
	11th to 20th	Night	12% 5% 2 5% 4 4 4 4 6% 7% 48%	2009
	21st to end	Night	21% 8% 2 7% 5% 3 5% 3 4 6% 34%	2132
October	1st to 10th	Night	18% 6% 2 6% 4 4 4 3 5% 7% 40%	2280
	11th to 20th	Night	22% 9% 3 7% 4 3 4 3 5% 7% 32%	2280
	21st to end	Night	28% 10% 3 5% 4 4 4 3 4 5% 29%	2508
November	1st to 10th	Night	15% 13% 3 6% 4 4 3 3 5% 6% 37%	2389
	11th to 20th	Night	18% 19% 4 7% 5% 5% 4 4 4 5% 25%	2660
	21st to end	Night	20% 20% 5% 9% 5% 4 3 3 5% 5% 20%	2660
December	1st to 10th	Night	21% 25% 9% 10% 4 4 4 3 3 4 13%	2660
	11th to 20th	Night	20% 20% 8% 14% 6% 3 3 2 4 4 16%	3288
	21st to end	Night	25% 23% 8% 10% 5% 4 3 3 4 4 10%	4884

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	76% 5% 7% 10% 3	2591
	11th to 20th	Day	76% 3 8% 10% 3	2840
	21st to end	Day	82% 4 6% 5% 2 1	3124
February	1st to 10th	Day	74% 4 8% 10% 5%	1710
	11th to 20th	Day	68% 6% 8% 12% 6%	1672
	21st to end	Day	64% 5% 10% 13% 5% 2	1524
March	1st to 10th	Day	57% 6% 11% 21% 5%	3435
	11th to 20th	Day	56% 8% 15% 16% 5% 1	3480
	21st to end	Day	55% 7% 7% 19% 10% 1	3815
April	1st to 10th	Day	56% 5% 11% 16% 12% 1	2237
	11th to 20th	Day	53% 6% 10% 18% 11% 2	2261
	21st to end	Day	53% 6% 10% 17% 11% 2	2470
May	1st to 10th	Day	55% 7% 9% 22% 8% 1	4120
	11th to 20th	Day	52% 10% 12% 17% 7% 1	4237
	21st to end	Day	39% 10% 13% 22% 14% 2	4837
June	1st to 10th	Day	47% 9% 12% 19% 13% 1	2660
	11th to 20th	Day	46% 9% 13% 19% 12% 1	2660
	21st to end	Day	44% 7% 13% 24% 11% 1	2660
July	1st to 10th	Day	42% 5% 13% 24% 15% 1	4370
	11th to 20th	Day	42% 6% 12% 24% 16%	4211
	21st to end	Day	44% 6% 13% 21% 14% 1	4324
August	1st to 10th	Day	51% 7% 12% 22% 7%	4091
	11th to 20th	Day	49% 8% 14% 23% 6% 1	4083
	21st to end	Day	43% 6% 13% 27% 11% 1	4282
September	1st to 10th	Day	46% 6% 11% 21% 15% 2	2280
	11th to 20th	Day	42% 7% 12% 23% 15% 1	2167
	21st to end	Day	52% 7% 10% 20% 11%	2047
October	1st to 10th	Day	42% 5% 12% 23% 17% 1	3160
	11th to 20th	Day	49% 5% 13% 17% 13% 4	3140
	21st to end	Day	48% 4 14% 23% 10% 1	3428
November	1st to 10th	Day	50% 7% 12% 16% 13% 2	1782
	11th to 20th	Day	60% 6% 12% 14% 6% 2	1520
	21st to end	Day	67% 6% 11% 11% 4 1	1520
December	1st to 10th	Day	77% 4 8% 8% 2	1520
	11th to 20th	Day	71% 6% 9% 11% 3	1906
	21st to end	Day	78% 6% 8% 7% 1	2772
January	1st to 10th	Night	77% 5% 7% 8% 3	4351
	11th to 20th	Night	78% 5% 8% 7% 2	4120
	21st to end	Night	80% 4 6% 8% 2	4532
February	1st to 10th	Night	71% 5% 7% 12% 5%	2470
	11th to 20th	Night	69% 6% 8% 12% 5%	2405
	21st to end	Night	66% 5% 9% 12% 8%	1923
March	1st to 10th	Night	59% 5% 9% 22% 5%	3418
	11th to 20th	Night	58% 7% 14% 15% 6% 1	3480
	21st to end	Night	50% 6% 9% 19% 14% 2	3817
April	1st to 10th	Night	55% 6% 11% 17% 11% 1	1943
	11th to 20th	Night	49% 6% 12% 19% 12% 2	1875
	21st to end	Night	48% 7% 13% 19% 11% 3	1720
May	1st to 10th	Night	53% 6% 11% 18% 10% 2	2840
	11th to 20th	Night	49% 9% 13% 18% 9% 1	2660
	21st to end	Night	35% 10% 14% 21% 15% 4	2739
June	1st to 10th	Night	39% 9% 14% 23% 14% 1	1520
	11th to 20th	Night	41% 8% 14% 22% 14% 2	1520
	21st to end	Night	40% 9% 13% 23% 15%	1520
July	1st to 10th	Night	45% 5% 10% 21% 17% 2	2480
	11th to 20th	Night	37% 4 16% 27% 15% 1	2622
	21st to end	Night	40% 6% 13% 19% 21% 1	2988
August	1st to 10th	Night	46% 7% 12% 25% 9% 1	2814
	11th to 20th	Night	44% 6% 14% 28% 7%	2812
	21st to end	Night	36% 6% 15% 32% 10% 1	3340
September	1st to 10th	Night	39% 7% 12% 23% 15% 3	1900
	11th to 20th	Night	33% 8% 13% 26% 19% 1	2009
	21st to end	Night	50% 6% 12% 18% 13% 1	2132
October	1st to 10th	Night	42% 6% 9% 22% 20% 1	3800
	11th to 20th	Night	45% 5% 13% 17% 14% 6%	3779
	21st to end	Night	43% 5% 15% 23% 14% 1	4120
November	1st to 10th	Night	47% 6% 13% 20% 11% 3	2389
	11th to 20th	Night	59% 7% 10% 14% 7% 3	2660
	21st to end	Night	64% 7% 11% 14% 4 1	2660
December	1st to 10th	Night	75% 6% 8% 8% 3	2660
	11th to 20th	Night	72% 6% 10% 10% 2	3288
	21st to end	Night	77% 7% 8% 7% 1	4884

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	34% 27% 28% 9% 2	202
	11th to 20th	Day	38% 29% 24% 6% 2 1	270
	21st to end	Day	34% 29% 29% 7% 1	297
February	1st to 10th	Day	34% 29% 30% 7%	270
	11th to 20th	Day	39% 30% 27% 4	270
	21st to end	Day	41% 24% 29% 6%	279
March	1st to 10th	Day	33% 23% 31% 11% 3	460
	11th to 20th	Day	32% 22% 33% 9% 3 2	460
	21st to end	Day	38% 21% 26% 12% 4 1	506
April	1st to 10th	Day	31% 25% 24% 15% 4 1	460
	11th to 20th	Day	30% 23% 24% 13% 7% 2	452
	21st to end	Day	31% 20% 30% 15% 3 1	460
May	1st to 10th	Day	32% 21% 25% 14% 6% 2	463
	11th to 20th	Day	25% 16% 27% 22% 8% 2	487
	21st to end	Day	16% 14% 29% 22% 14% 5%	529
June	1st to 10th	Day	22% 13% 30% 24% 8% 2	490
	11th to 20th	Day	19% 12% 28% 26% 13% 2	490
	21st to end	Day	22% 13% 32% 23% 8% 2	490
July	1st to 10th	Day	14% 8% 27% 26% 19% 6%	485
	11th to 20th	Day	14% 8% 31% 24% 16% 7%	484
	21st to end	Day	14% 9% 32% 25% 15% 5%	532
August	1st to 10th	Day	15% 8% 26% 26% 19% 7%	486
	11th to 20th	Day	19% 5% 25% 29% 12% 10%	479
	21st to end	Day	16% 8% 27% 27% 14% 8%	539
September	1st to 10th	Day	22% 11% 21% 24% 15% 7%	490
	11th to 20th	Day	15% 5% 24% 27% 20% 9%	490
	21st to end	Day	26% 11% 27% 18% 14% 4	490
October	1st to 10th	Day	23% 12% 29% 18% 14% 4	490
	11th to 20th	Day	29% 17% 31% 15% 6% 2	490
	21st to end	Day	34% 19% 28% 15% 4	539
November	1st to 10th	Day	25% 19% 30% 17% 7% 2	383
	11th to 20th	Day	36% 22% 27% 11% 4 1	180
	21st to end	Day	34% 24% 33% 8% 1	180
December	1st to 10th	Day	39% 27% 23% 7% 3 2	180
	11th to 20th	Day	40% 22% 28% 9% 1	180
	21st to end	Day	37% 24% 31% 6% 2	198
January	1st to 10th	Night	32% 23% 33% 10% 3	760
	11th to 20th	Night	33% 22% 30% 13% 2	760
	21st to end	Night	27% 25% 31% 15% 2	836
February	1st to 10th	Night	33% 21% 30% 16% 1	760
	11th to 20th	Night	30% 25% 34% 10% 1	743
	21st to end	Night	32% 25% 28% 13% 2	628
March	1st to 10th	Night	27% 23% 32% 16% 3	760
	11th to 20th	Night	30% 21% 25% 19% 5%	760
	21st to end	Night	29% 18% 32% 17% 3 1	836
April	1st to 10th	Night	31% 16% 31% 18% 5%	760
	11th to 20th	Night	29% 15% 28% 19% 9%	751
	21st to end	Night	21% 12% 33% 29% 4 1	580
May	1st to 10th	Night	26% 10% 24% 29% 11%	570
	11th to 20th	Night	22% 9% 29% 31% 8%	473
	21st to end	Night	13% 8% 29% 29% 19% 2	411
June	1st to 10th	Night	14% 4 30% 36% 15% 1	380
	11th to 20th	Night	14% 8% 27% 39% 12%	380
	21st to end	Night	18% 6% 28% 33% 13% 1	380
July	1st to 10th	Night	12% 5% 21% 39% 20% 4	370
	11th to 20th	Night	13% 4 19% 38% 23% 2	453
	21st to end	Night	13% 3 18% 43% 21% 1	624
August	1st to 10th	Night	13% 3 18% 38% 26% 2	567
	11th to 20th	Night	16% 4 17% 32% 28% 4	564
	21st to end	Night	13% 4 21% 33% 26% 3	752
September	1st to 10th	Night	18% 6% 23% 29% 21% 3	760
	11th to 20th	Night	14% 5% 19% 33% 26% 4	760
	21st to end	Night	24% 10% 21% 25% 16% 3	760
October	1st to 10th	Night	23% 8% 24% 26% 18% 2	760
	11th to 20th	Night	26% 13% 29% 23% 8% 1	760
	21st to end	Night	34% 14% 27% 22% 4	836
November	1st to 10th	Night	23% 15% 30% 24% 8%	760
	11th to 20th	Night	32% 16% 29% 17% 5% 1	760
	21st to end	Night	31% 20% 29% 16% 4	760
December	1st to 10th	Night	37% 24% 25% 11% 3	760
	11th to 20th	Night	30% 26% 27% 14% 3	760
	21st to end	Night	32% 23% 30% 13% 2	836

Page generated at 2024-11-03 02:11:08. Version ac07

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