Stephanie's Evening Solace
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Stephanie's Evening Solace clear sky chart from 2005-11-06 to 2026-02-16.

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	13% 6% 2 6% 5% 4 5% 4 6% 8% 41%	131056
	Night	14% 7% 2 6% 4 3 3 3 5% 7% 46%	130049
Transparency	Day	39% 6% 11% 19% 17% 8%	134731
	Night	36% 6% 11% 20% 18% 9%	134438
Seeing	Day	13% 7% 19% 26% 25% 11%	16502
	Night	15% 7% 23% 34% 20% 2	26490

By Month

Percentage Cloud Cover SE (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% 9% 3 6% 3 3 3 2 4 5% 44%	5289
	11th to 20th	Day	14% 6% 2 6% 4 3 3 2 3 4 52%	5310
	21st to end	Day	27% 8% 3 8% 3 2 3 2 4 6% 35%	5812
February	1st to 10th	Day	21% 8% 3 6% 4 4 3 3 5% 5% 38%	2020
	11th to 20th	Day	20% 10% 3 6% 4 4 3 3 3 5% 38%	1999
	21st to end	Day	20% 8% 2 6% 4 4 4 3 4 5% 41%	1800
March	1st to 10th	Day	15% 7% 3 7% 5% 5% 4 4 5% 7% 39%	4936
	11th to 20th	Day	14% 6% 3 6% 4 4 3 3 5% 6% 47%	4980
	21st to end	Day	18% 7% 2 6% 5% 4 4 3 4 5% 40%	5462
April	1st to 10th	Day	15% 8% 3 9% 5% 5% 3 4 4 6% 38%	2200
	11th to 20th	Day	17% 7% 2 6% 5% 4 5% 4 5% 6% 40%	2305
	21st to end	Day	12% 7% 3 8% 5% 4 4 4 6% 7% 41%	2400
May	1st to 10th	Day	20% 7% 3 7% 5% 4 5% 4 6% 7% 32%	5635
	11th to 20th	Day	11% 6% 2 7% 4 4 5% 4 5% 8% 44%	5862
	21st to end	Day	10% 7% 3 8% 5% 6% 5% 5% 7% 10% 34%	6434
June	1st to 10th	Day	6% 5% 2 6% 5% 5% 6% 6% 8% 9% 43%	2600
	11th to 20th	Day	6% 3 2 5% 5% 5% 7% 6% 9% 10% 42%	2600
	21st to end	Day	6% 5% 3 8% 8% 7% 8% 7% 9% 10% 29%	2600
July	1st to 10th	Day	8% 5% 2 8% 6% 5% 7% 5% 8% 11% 34%	5900
	11th to 20th	Day	5% 5% 2 7% 5% 6% 7% 6% 9% 14% 33%	5900
	21st to end	Day	10% 7% 3 7% 5% 5% 5% 5% 7% 10% 36%	6422
August	1st to 10th	Day	2 2 1 3 3 4 4 4 6% 10% 60%	4234
	11th to 20th	Day	3 2 1 4 3 4 7% 5% 10% 14% 46%	4054
	21st to end	Day	6% 5% 2 7% 6% 7% 6% 5% 7% 10% 39%	4154
September	1st to 10th	Day	7% 5% 1 7% 5% 6% 6% 5% 7% 9% 41%	2200
	11th to 20th	Day	10% 6% 3 8% 5% 5% 6% 4 6% 8% 38%	2200
	21st to end	Day	7% 4 2 6% 4 5% 5% 5% 6% 8% 48%	2200
October	1st to 10th	Day	6% 4 1 4 4 3 3 4 5% 6% 59%	2102
	11th to 20th	Day	10% 5% 2 6% 4 4 4 3 4 6% 53%	2000
	21st to end	Day	12% 5% 2 5% 3 4 3 3 4 5% 54%	2200
November	1st to 10th	Day	10% 6% 2 6% 4 4 4 4 5% 8% 47%	2058
	11th to 20th	Day	12% 6% 2 5% 3 4 3 3 6% 6% 49%	2100
	21st to end	Day	17% 7% 2 5% 4 5% 4 3 4 6% 42%	1990
December	1st to 10th	Day	24% 7% 2 6% 3 3 3 3 4 5% 39%	3030
	11th to 20th	Day	16% 8% 3 6% 4 3 4 3 4 6% 43%	3481
	21st to end	Day	16% 7% 2 6% 4 3 3 3 4 5% 47%	4587
January	1st to 10th	Night	18% 7% 2 5% 3 3 3 2 3 5% 48%	7634
	11th to 20th	Night	12% 6% 2 5% 3 3 3 2 4 5% 54%	7680
	21st to end	Night	30% 7% 2 6% 3 2 3 2 4 5% 35%	8402
February	1st to 10th	Night	20% 9% 3 6% 3 3 3 2 4 6% 40%	2618
	11th to 20th	Night	22% 8% 2 6% 3 3 3 2 3 5% 43%	2398
	21st to end	Night	23% 7% 3 5% 3 3 3 2 4 6% 40%	1828
March	1st to 10th	Night	20% 9% 3 6% 3 3 4 3 5% 6% 38%	4919
	11th to 20th	Night	18% 8% 3 6% 4 2 3 2 4 5% 45%	4980
	21st to end	Night	20% 9% 3 6% 4 3 3 3 3 5% 41%	5467
April	1st to 10th	Night	15% 7% 2 6% 4 4 5% 3 4 6% 42%	2200
	11th to 20th	Night	16% 7% 2 5% 4 3 3 3 5% 7% 45%	2041
	21st to end	Night	15% 6% 3 6% 4 4 4 3 5% 7% 44%	2000
May	1st to 10th	Night	24% 9% 3 7% 5% 4 4 3 5% 7% 29%	4240
	11th to 20th	Night	12% 6% 3 6% 4 4 5% 4 7% 8% 41%	4053
	21st to end	Night	14% 8% 3 7% 4 4 5% 4 8% 10% 33%	4443
June	1st to 10th	Night	6% 4 2 4 3 3 4 5% 6% 10% 54%	1800
	11th to 20th	Night	4 4 1 4 3 3 4 3 7% 11% 55%	1800
	21st to end	Night	4 5% 1 5% 5% 5% 4 6% 8% 11% 45%	1800
July	1st to 10th	Night	6% 5% 2 6% 4 5% 5% 5% 8% 14% 39%	4078
	11th to 20th	Night	4 4 2 6% 4 5% 4 4 6% 12% 49%	4077
	21st to end	Night	7% 6% 2 7% 4 5% 4 4 6% 9% 46%	4449
August	1st to 10th	Night	1 1 1 2 3 2 3 2 5% 10% 70%	2926
	11th to 20th	Night	2 2 1 3 2 3 4 4 8% 12% 60%	2998
	21st to end	Night	4 3 1 5% 4 6% 5% 5% 8% 12% 47%	3738
September	1st to 10th	Night	5% 5% 2 5% 5% 4 4 5% 8% 10% 48%	2200
	11th to 20th	Night	10% 5% 3 7% 5% 4 4 3 6% 8% 45%	2200
	21st to end	Night	7% 5% 1 4 3 3 4 3 6% 8% 55%	2200
October	1st to 10th	Night	3 4 1 5% 3 3 3 3 5% 8% 62%	2276
	11th to 20th	Night	10% 4 1 3 3 3 3 3 4 5% 61%	2400
	21st to end	Night	11% 5% 2 4 3 3 3 2 3 4 60%	2640
November	1st to 10th	Night	11% 6% 2 5% 4 3 4 3 4 6% 54%	2460
	11th to 20th	Night	12% 5% 2 5% 3 4 3 3 5% 5% 52%	2520
	21st to end	Night	17% 6% 3 6% 4 3 3 3 5% 6% 45%	2625
December	1st to 10th	Night	21% 10% 3 8% 4 3 3 3 4 5% 36%	4380
	11th to 20th	Night	17% 10% 3 6% 4 3 3 2 3 5% 44%	4946
	21st to end	Night	16% 7% 2 5% 3 3 3 3 3 5% 49%	6633

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	44% 4 7% 21% 18% 7%	5290
	11th to 20th	Day	37% 3 4 17% 24% 15%	5310
	21st to end	Day	54% 2 4 12% 17% 12%	5812
February	1st to 10th	Day	49% 4 5% 13% 17% 13%	2020
	11th to 20th	Day	50% 4 6% 15% 16% 9%	2009
	21st to end	Day	47% 5% 7% 16% 14% 11%	1800
March	1st to 10th	Day	44% 6% 6% 16% 17% 12%	4936
	11th to 20th	Day	39% 4 6% 11% 19% 21%	4980
	21st to end	Day	45% 5% 7% 19% 18% 6%	5464
April	1st to 10th	Day	48% 6% 6% 16% 16% 9%	2200
	11th to 20th	Day	44% 6% 8% 15% 18% 10%	2305
	21st to end	Day	41% 6% 8% 19% 20% 6%	2400
May	1st to 10th	Day	49% 6% 10% 20% 11% 3	5670
	11th to 20th	Day	38% 6% 12% 22% 20% 2	5866
	21st to end	Day	41% 7% 12% 27% 12% 1	6447
June	1st to 10th	Day	31% 9% 16% 26% 16% 2	2600
	11th to 20th	Day	32% 9% 17% 24% 16% 2	2600
	21st to end	Day	43% 12% 15% 20% 9%	2600
July	1st to 10th	Day	39% 10% 29% 20% 3	5836
	11th to 20th	Day	36% 11% 25% 22% 6%	5831
	21st to end	Day	40% 9% 18% 24% 8%	6240
August	1st to 10th	Day	18% 7% 16% 39% 20% 1	4220
	11th to 20th	Day	24% 9% 33% 27% 6% 1	4093
	21st to end	Day	37% 11% 17% 20% 13% 1	4153
September	1st to 10th	Day	37% 10% 14% 19% 15% 6%	2200
	11th to 20th	Day	41% 8% 12% 18% 17% 4	2200
	21st to end	Day	32% 7% 13% 19% 17% 13%	2200
October	1st to 10th	Day	17% 5% 5% 14% 21% 39%	3427
	11th to 20th	Day	22% 4 5% 15% 34% 18%	3240
	21st to end	Day	27% 4 5% 16% 34% 14%	3538
November	1st to 10th	Day	36% 6% 8% 17% 22% 11%	2058
	11th to 20th	Day	35% 5% 9% 15% 23% 13%	2100
	21st to end	Day	43% 5% 7% 16% 18% 10%	1990
December	1st to 10th	Day	49% 3 5% 16% 21% 5%	3030
	11th to 20th	Day	42% 5% 7% 13% 22% 11%	3479
	21st to end	Day	39% 5% 5% 16% 24% 11%	4587
January	1st to 10th	Night	39% 4 8% 19% 19% 10%	7635
	11th to 20th	Night	34% 3 4 19% 25% 15%	7680
	21st to end	Night	53% 3 3 13% 17% 10%	8402
February	1st to 10th	Night	46% 4 5% 12% 18% 14%	2618
	11th to 20th	Night	45% 4 7% 16% 18% 11%	2398
	21st to end	Night	47% 4 7% 14% 16% 13%	1828
March	1st to 10th	Night	46% 5% 6% 15% 18% 9%	4919
	11th to 20th	Night	42% 5% 6% 14% 15% 19%	4980
	21st to end	Night	46% 4 7% 15% 20% 8%	5467
April	1st to 10th	Night	42% 6% 9% 18% 15% 10%	2200
	11th to 20th	Night	39% 5% 10% 17% 16% 13%	2041
	21st to end	Night	40% 5% 9% 20% 18% 7%	2000
May	1st to 10th	Night	53% 6% 9% 20% 9% 3	4270
	11th to 20th	Night	37% 7% 13% 21% 18% 4	4054
	21st to end	Night	42% 9% 14% 27% 7% 1	4452
June	1st to 10th	Night	23% 8% 19% 32% 18% 1	1800
	11th to 20th	Night	23% 7% 19% 31% 18% 4	1800
	21st to end	Night	29% 10% 21% 26% 12% 1	1800
July	1st to 10th	Night	32% 10% 34% 21% 3	4035
	11th to 20th	Night	28% 8% 27% 31% 7%	4026
	21st to end	Night	34% 9% 20% 28% 9%	4320
August	1st to 10th	Night	11% 5% 19% 46% 19%	2916
	11th to 20th	Night	16% 7% 35% 34% 7%	3025
	21st to end	Night	28% 13% 21% 27% 9% 1	3738
September	1st to 10th	Night	29% 10% 21% 20% 13% 6%	2200
	11th to 20th	Night	35% 9% 14% 22% 15% 5%	2200
	21st to end	Night	25% 7% 15% 22% 18% 12%	2200
October	1st to 10th	Night	14% 4 8% 18% 17% 39%	3718
	11th to 20th	Night	16% 3 5% 23% 32% 22%	3899
	21st to end	Night	21% 3 5% 19% 35% 16%	4252
November	1st to 10th	Night	32% 4 10% 20% 22% 11%	2460
	11th to 20th	Night	34% 5% 9% 18% 21% 14%	2520
	21st to end	Night	41% 4 8% 18% 19% 11%	2625
December	1st to 10th	Night	52% 4 5% 15% 19% 6%	4380
	11th to 20th	Night	44% 4 8% 9% 21% 14%	4947
	21st to end	Night	38% 5% 5% 14% 29% 9%	6633

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% 14% 35% 20% 8% 1	330
	11th to 20th	Day	23% 17% 26% 25% 8% 1	330
	21st to end	Day	25% 18% 33% 18% 6%	363
February	1st to 10th	Day	25% 16% 28% 24% 6% 1	330
	11th to 20th	Day	27% 21% 28% 19% 4 1	315
	21st to end	Day	27% 20% 35% 14% 4	249
March	1st to 10th	Day	23% 19% 36% 17% 6%	300
	11th to 20th	Day	15% 22% 40% 18% 4 1	300
	21st to end	Day	21% 13% 34% 23% 9%	330
April	1st to 10th	Day	16% 20% 37% 21% 7%	300
	11th to 20th	Day	24% 14% 28% 23% 10% 1	423
	21st to end	Day	15% 11% 35% 29% 9% 2	500
May	1st to 10th	Day	15% 11% 32% 29% 12%	603
	11th to 20th	Day	14% 6% 28% 34% 17% 2	725
	21st to end	Day	9% 6% 25% 36% 21% 4	789
June	1st to 10th	Day	7% 2 11% 36% 34% 10%	730
	11th to 20th	Day	7% 2 10% 35% 34% 12%	730
	21st to end	Day	8% 2 10% 26% 35% 20%	730
July	1st to 10th	Day	7% 2 8% 23% 37% 22%	721
	11th to 20th	Day	4 1 4 19% 48% 24%	718
	21st to end	Day	6% 2 3 20% 46% 22%	794
August	1st to 10th	Day	3 1 2 19% 48% 27%	726
	11th to 20th	Day	5% 1 3 16% 45% 30%	650
	21st to end	Day	9% 2 3 17% 33% 36%	490
September	1st to 10th	Day	8% 2 4 28% 38% 20%	330
	11th to 20th	Day	7% 2 8% 21% 40% 23%	330
	21st to end	Day	7% 2 9% 30% 34% 19%	330
October	1st to 10th	Day	6% 2 8% 39% 36% 9%	330
	11th to 20th	Day	9% 5% 19% 34% 24% 9%	330
	21st to end	Day	18% 9% 23% 22% 22% 6%	363
November	1st to 10th	Day	14% 6% 18% 37% 21% 4	330
	11th to 20th	Day	14% 6% 28% 33% 17% 2	330
	21st to end	Day	19% 17% 29% 23% 9% 3	330
December	1st to 10th	Day	20% 7% 37% 24% 8% 4	330
	11th to 20th	Day	22% 16% 29% 24% 7% 2	330
	21st to end	Day	17% 12% 34% 26% 8% 2	363
January	1st to 10th	Night	24% 10% 30% 29% 8%	1050
	11th to 20th	Night	20% 12% 30% 31% 6%	1050
	21st to end	Night	25% 10% 30% 30% 5%	1155
February	1st to 10th	Night	25% 12% 31% 29% 4	938
	11th to 20th	Night	26% 10% 31% 28% 4	804
	21st to end	Night	27% 13% 35% 23% 3	508
March	1st to 10th	Night	24% 11% 34% 28% 4	600
	11th to 20th	Night	20% 10% 35% 30% 6%	600
	21st to end	Night	18% 9% 38% 29% 5% 1	660
April	1st to 10th	Night	17% 9% 36% 33% 5%	600
	11th to 20th	Night	21% 8% 31% 31% 10%	593
	21st to end	Night	17% 8% 35% 31% 9%	600
May	1st to 10th	Night	16% 9% 31% 36% 8%	600
	11th to 20th	Night	12% 6% 30% 37% 13% 2	591
	21st to end	Night	9% 4 25% 39% 21% 2	650
June	1st to 10th	Night	7% 2 12% 46% 30% 3	600
	11th to 20th	Night	5% 2 13% 52% 28% 2	600
	21st to end	Night	5% 2 10% 37% 40% 7%	600
July	1st to 10th	Night	6% 2 5% 37% 42% 8%	585
	11th to 20th	Night	4 1 3 37% 50% 5%	582
	21st to end	Night	3 1 5% 38% 49% 5%	657
August	1st to 10th	Night	1 1 2 39% 51% 5%	597
	11th to 20th	Night	4 1 3 34% 52% 7%	594
	21st to end	Night	5% 1 4 29% 51% 10%	660
September	1st to 10th	Night	5% 1 6% 31% 50% 7%	600
	11th to 20th	Night	10% 2 7% 33% 46% 4	600
	21st to end	Night	8% 2 9% 34% 41% 6%	600
October	1st to 10th	Night	4 2 12% 39% 37% 5%	676
	11th to 20th	Night	11% 2 21% 40% 24% 2	800
	21st to end	Night	13% 7% 23% 35% 20% 2	880
November	1st to 10th	Night	12% 5% 21% 39% 21% 1	820
	11th to 20th	Night	14% 9% 23% 38% 16% 1	840
	21st to end	Night	19% 8% 27% 31% 13% 1	945
December	1st to 10th	Night	22% 8% 27% 32% 11% 1	1050
	11th to 20th	Night	23% 11% 28% 31% 7% 1	1050
	21st to end	Night	22% 9% 30% 30% 8%	1155

Page generated at 2026-02-13 00:42:11. Version ac07

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