Wichita Falls
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Wichita Falls clear sky chart from 2005-11-06 to 2025-10-19.

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	8% 5% 2 4 3 3 3 3 5% 6% 57%	126519
	Night	8% 4 2 4 3 3 3 3 5% 7% 60%	123499
Transparency	Day	27% 5% 9% 24% 26% 11%	130288
	Night	25% 4 8% 23% 27% 13%	127793
Seeing	Day	9% 6% 23% 31% 23% 7%	16536
	Night	9% 7% 32% 38% 14% 1	26357

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	9% 6% 2 5% 4 3 3 3 4 5% 57%	4077
	11th to 20th	Day	6% 5% 1 2 2 2 2 2 3 6% 69%	4080
	21st to end	Day	15% 7% 2 4 3 3 3 3 5% 5% 51%	4534
February	1st to 10th	Day	10% 6% 2 5% 3 3 3 3 5% 6% 56%	2000
	11th to 20th	Day	11% 6% 2 6% 3 3 3 3 5% 5% 53%	1949
	21st to end	Day	15% 8% 2 4 2 2 1 1 2 5% 56%	1650
March	1st to 10th	Day	13% 4 1 4 3 3 3 3 4 5% 58%	4752
	11th to 20th	Day	8% 4 2 5% 3 3 3 3 4 6% 59%	4980
	21st to end	Day	7% 6% 2 5% 4 4 4 4 6% 7% 52%	5462
April	1st to 10th	Day	10% 5% 2 4 3 3 4 4 5% 6% 57%	2200
	11th to 20th	Day	12% 5% 2 4 3 4 4 3 4 5% 54%	2338
	21st to end	Day	11% 6% 1 5% 4 3 4 3 5% 6% 53%	2600
May	1st to 10th	Day	16% 6% 2 5% 4 4 4 3 5% 6% 45%	5862
	11th to 20th	Day	10% 6% 2 5% 3 3 4 3 5% 6% 53%	5862
	21st to end	Day	10% 6% 2 6% 4 5% 4 4 6% 6% 45%	6434
June	1st to 10th	Day	7% 4 2 5% 4 3 5% 4 7% 9% 52%	2600
	11th to 20th	Day	5% 3 2 4 3 4 3 4 5% 8% 59%	2600
	21st to end	Day	5% 4 1 3 3 3 3 3 5% 8% 62%	2600
July	1st to 10th	Day	9% 6% 2 7% 4 4 5% 3 6% 8% 45%	5900
	11th to 20th	Day	3 3 1 5% 4 4 4 3 6% 8% 59%	5900
	21st to end	Day	2 2 1 3 2 3 3 3 5% 8% 67%	6422
August	1st to 10th	Day	3 2 1 4 2 2 3 3 5% 8% 67%	4234
	11th to 20th	Day	3 3 1 3 2 3 3 3 6% 10% 62%	4045
	21st to end	Day	4 2 1 3 3 3 4 3 5% 8% 65%	4263
September	1st to 10th	Day	11% 3 2 4 4 3 3 2 4 5% 59%	2200
	11th to 20th	Day	10% 5% 2 6% 4 4 4 3 4 7% 50%	2200
	21st to end	Day	8% 3 1 4 4 3 4 4 4 6% 60%	2200
October	1st to 10th	Day	5% 3 1 4 3 4 3 3 4 6% 64%	2200
	11th to 20th	Day	9% 2 1 2 2 2 3 2 4 5% 67%	2020
	21st to end	Day	11% 4 1 3 2 2 2 2 3 4 65%	2090
November	1st to 10th	Day	8% 4 1 4 3 3 2 3 4 6% 62%	1846
	11th to 20th	Day	5% 2 1 3 2 2 3 3 3 6% 69%	1800
	21st to end	Day	11% 5% 1 4 2 2 3 2 4 6% 60%	1800
December	1st to 10th	Day	7% 6% 2 6% 3 3 3 3 4 5% 57%	2940
	11th to 20th	Day	8% 4 2 4 3 3 4 3 4 5% 59%	3391
	21st to end	Day	11% 7% 2 6% 3 3 3 2 3 5% 54%	4488
January	1st to 10th	Night	12% 6% 2 5% 3 3 3 3 4 5% 55%	5888
	11th to 20th	Night	4 3 1 3 2 2 2 2 4 6% 72%	5900
	21st to end	Night	15% 7% 2 4 3 2 2 2 4 5% 54%	6473
February	1st to 10th	Night	11% 6% 2 4 3 3 3 3 4 5% 57%	2400
	11th to 20th	Night	12% 5% 3 3 3 3 3 2 4 6% 56%	2338
	21st to end	Night	10% 6% 2 4 3 2 3 2 3 5% 58%	1980
March	1st to 10th	Night	10% 6% 2 4 3 3 2 3 4 5% 58%	5108
	11th to 20th	Night	7% 3 1 3 2 2 3 2 4 7% 66%	4980
	21st to end	Night	6% 5% 2 6% 3 3 4 4 5% 7% 55%	5467
April	1st to 10th	Night	9% 4 2 4 3 3 3 2 5% 8% 57%	2200
	11th to 20th	Night	9% 4 1 4 3 3 3 3 5% 7% 57%	2004
	21st to end	Night	10% 4 2 4 3 3 3 3 5% 7% 56%	1800
May	1st to 10th	Night	14% 6% 2 4 4 3 3 3 5% 6% 50%	4053
	11th to 20th	Night	8% 4 2 5% 3 3 4 3 6% 8% 55%	4053
	21st to end	Night	9% 4 1 5% 4 3 4 3 5% 8% 53%	4443
June	1st to 10th	Night	5% 2 1 3 3 3 4 4 7% 12% 57%	1800
	11th to 20th	Night	3 4 1 3 3 3 4 4 6% 10% 59%	1800
	21st to end	Night	3 3 1 4 3 2 3 3 5% 7% 67%	1800
July	1st to 10th	Night	7% 5% 2 7% 5% 4 5% 4 6% 8% 46%	4078
	11th to 20th	Night	2 1 1 3 2 3 3 3 6% 11% 65%	4077
	21st to end	Night	2 2 1 3 2 2 3 3 6% 8% 69%	4449
August	1st to 10th	Night	1 1 1 3 2 3 3 3 6% 7% 70%	2926
	11th to 20th	Night	3 2 1 3 2 3 3 3 5% 10% 65%	3010
	21st to end	Night	3 2 1 3 2 3 3 3 7% 10% 64%	3642
September	1st to 10th	Night	8% 4 1 5% 3 3 4 3 5% 6% 59%	2200
	11th to 20th	Night	7% 6% 2 7% 4 4 3 3 4 5% 54%	2200
	21st to end	Night	7% 3 1 4 2 3 3 3 5% 6% 62%	2200
October	1st to 10th	Night	6% 3 1 3 3 2 3 3 4 7% 65%	2200
	11th to 20th	Night	8% 3 1 3 2 2 3 2 3 5% 67%	2317
	21st to end	Night	10% 4 1 3 2 2 2 2 3 4 66%	2508
November	1st to 10th	Night	9% 3 1 4 2 2 2 2 3 5% 66%	2449
	11th to 20th	Night	4 3 1 4 2 3 3 3 4 6% 67%	2600
	21st to end	Night	12% 4 1 3 3 2 3 2 5% 6% 59%	2600
December	1st to 10th	Night	8% 5% 2 4 2 2 3 2 4 5% 63%	4250
	11th to 20th	Night	9% 4 2 5% 3 3 3 2 4 5% 60%	4816
	21st to end	Night	12% 6% 2 5% 3 3 3 3 4 5% 56%	6490

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	31% 4 6% 29% 25% 5%	4078
	11th to 20th	Day	19% 3 6% 22% 43% 8%	4080
	21st to end	Day	35% 3 6% 19% 23% 14%	4534
February	1st to 10th	Day	30% 5% 7% 22% 28% 9%	2000
	11th to 20th	Day	34% 4 8% 21% 24% 10%	1959
	21st to end	Day	34% 2 3 15% 30% 16%	1650
March	1st to 10th	Day	30% 3 6% 13% 23% 26%	4752
	11th to 20th	Day	26% 5% 7% 18% 23% 21%	4980
	21st to end	Day	30% 6% 8% 24% 23% 8%	5464
April	1st to 10th	Day	28% 5% 8% 24% 23% 13%	2200
	11th to 20th	Day	32% 5% 7% 20% 22% 14%	2338
	21st to end	Day	31% 5% 10% 24% 24% 7%	2600
May	1st to 10th	Day	38% 6% 10% 22% 15% 10%	5900
	11th to 20th	Day	31% 6% 8% 19% 26% 9%	5866
	21st to end	Day	36% 7% 11% 23% 13% 10%	6447
June	1st to 10th	Day	27% 8% 15% 28% 18% 4	2600
	11th to 20th	Day	22% 6% 13% 26% 26% 7%	2600
	21st to end	Day	21% 5% 13% 27% 27% 8%	2600
July	1st to 10th	Day	36% 6% 10% 25% 18% 4	5836
	11th to 20th	Day	22% 5% 12% 27% 28% 5%	5831
	21st to end	Day	14% 4 13% 32% 32% 4	6240
August	1st to 10th	Day	16% 4 10% 24% 32% 13%	4220
	11th to 20th	Day	18% 5% 12% 33% 25% 7%	4084
	21st to end	Day	19% 5% 14% 32% 25% 5%	4262
September	1st to 10th	Day	28% 4 9% 21% 26% 12%	2200
	11th to 20th	Day	35% 6% 9% 18% 24% 9%	2200
	21st to end	Day	24% 5% 7% 22% 27% 14%	2200
October	1st to 10th	Day	13% 3 6% 14% 38% 26%	3590
	11th to 20th	Day	16% 3 8% 19% 38% 16%	3286
	21st to end	Day	19% 3 4 29% 34% 10%	3428
November	1st to 10th	Day	25% 4 8% 22% 27% 14%	1846
	11th to 20th	Day	19% 3 8% 25% 31% 15%	1800
	21st to end	Day	28% 4 5% 21% 29% 12%	1800
December	1st to 10th	Day	30% 3 5% 33% 23% 5%	2940
	11th to 20th	Day	28% 4 6% 17% 33% 13%	3389
	21st to end	Day	34% 3 6% 26% 23% 8%	4488
January	1st to 10th	Night	32% 3 6% 28% 24% 6%	5888
	11th to 20th	Night	16% 3 8% 18% 40% 15%	5900
	21st to end	Night	34% 3 5% 17% 27% 13%	6473
February	1st to 10th	Night	30% 3 7% 20% 27% 12%	2400
	11th to 20th	Night	30% 4 8% 21% 23% 14%	2338
	21st to end	Night	30% 3 5% 17% 24% 21%	1980
March	1st to 10th	Night	29% 3 5% 14% 24% 25%	5108
	11th to 20th	Night	20% 4 7% 19% 20% 30%	4980
	21st to end	Night	28% 5% 9% 21% 30% 8%	5467
April	1st to 10th	Night	27% 4 10% 19% 24% 16%	2200
	11th to 20th	Night	26% 5% 12% 17% 25% 15%	2004
	21st to end	Night	28% 5% 9% 23% 27% 7%	1800
May	1st to 10th	Night	34% 6% 12% 19% 20% 8%	4080
	11th to 20th	Night	26% 6% 9% 20% 26% 12%	4054
	21st to end	Night	29% 6% 13% 23% 18% 11%	4452
June	1st to 10th	Night	19% 7% 16% 34% 19% 5%	1800
	11th to 20th	Night	20% 5% 14% 27% 26% 8%	1800
	21st to end	Night	18% 5% 11% 25% 30% 11%	1800
July	1st to 10th	Night	35% 6% 10% 29% 17% 3	4035
	11th to 20th	Night	15% 4 11% 32% 31% 7%	4026
	21st to end	Night	14% 3 12% 36% 31% 4	4320
August	1st to 10th	Night	12% 4 8% 26% 36% 13%	2916
	11th to 20th	Night	15% 4 12% 32% 28% 9%	3037
	21st to end	Night	15% 5% 15% 35% 25% 5%	3642
September	1st to 10th	Night	26% 5% 9% 22% 27% 12%	2200
	11th to 20th	Night	32% 5% 8% 21% 23% 11%	2200
	21st to end	Night	23% 4 6% 21% 29% 18%	2200
October	1st to 10th	Night	13% 3 6% 14% 33% 31%	3590
	11th to 20th	Night	18% 3 6% 17% 33% 22%	3777
	21st to end	Night	19% 3 5% 26% 34% 13%	4120
November	1st to 10th	Night	23% 3 7% 21% 28% 18%	2449
	11th to 20th	Night	19% 4 8% 21% 32% 17%	2600
	21st to end	Night	27% 4 6% 19% 30% 14%	2600
December	1st to 10th	Night	25% 3 5% 28% 29% 9%	4250
	11th to 20th	Night	28% 3 6% 18% 29% 16%	4817
	21st to end	Night	32% 3 6% 23% 27% 9%	6490

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	13% 11% 34% 33% 8% 1	300
	11th to 20th	Day	13% 13% 33% 31% 8% 2	300
	21st to end	Day	12% 8% 42% 27% 9% 2	330
February	1st to 10th	Day	16% 10% 38% 29% 7%	300
	11th to 20th	Day	13% 11% 46% 26% 5%	300
	21st to end	Day	22% 13% 38% 19% 8%	249
March	1st to 10th	Day	16% 15% 36% 25% 9%	300
	11th to 20th	Day	17% 18% 39% 19% 5% 2	300
	21st to end	Day	11% 13% 45% 22% 7% 1	330
April	1st to 10th	Day	15% 14% 37% 22% 11% 1	300
	11th to 20th	Day	16% 13% 45% 21% 5%	456
	21st to end	Day	13% 13% 39% 26% 8% 1	700
May	1st to 10th	Day	10% 9% 35% 34% 11% 1	703
	11th to 20th	Day	12% 7% 33% 31% 14% 2	725
	21st to end	Day	10% 6% 32% 32% 15% 5%	789
June	1st to 10th	Day	6% 3 16% 41% 28% 5%	730
	11th to 20th	Day	6% 2 17% 42% 27% 6%	730
	21st to end	Day	5% 1 11% 39% 35% 8%	730
July	1st to 10th	Day	6% 2 7% 34% 36% 16%	721
	11th to 20th	Day	3 1 6% 36% 40% 14%	718
	21st to end	Day	2 1 4 30% 44% 20%	794
August	1st to 10th	Day	3 1 7% 33% 43% 13%	726
	11th to 20th	Day	5% 2 7% 32% 40% 13%	641
	21st to end	Day	5% 1 6% 28% 39% 21%	560
September	1st to 10th	Day	11% 2 3 24% 38% 22%	330
	11th to 20th	Day	6% 1 7% 27% 42% 17%	330
	21st to end	Day	12% 2 7% 30% 34% 15%	330
October	1st to 10th	Day	3 2 15% 39% 26% 15%	330
	11th to 20th	Day	8% 6% 27% 38% 18% 5%	324
	21st to end	Day	19% 8% 25% 28% 18% 3	330
November	1st to 10th	Day	12% 8% 31% 29% 18% 3	300
	11th to 20th	Day	10% 12% 26% 33% 16% 4	300
	21st to end	Day	14% 11% 35% 26% 11% 3	300
December	1st to 10th	Day	10% 8% 37% 32% 12% 1	300
	11th to 20th	Day	10% 8% 37% 33% 11% 1	300
	21st to end	Day	18% 12% 35% 26% 8%	330
January	1st to 10th	Night	10% 8% 39% 35% 8%	1000
	11th to 20th	Night	10% 10% 37% 37% 6%	1000
	21st to end	Night	12% 9% 35% 37% 7%	1096
February	1st to 10th	Night	14% 8% 43% 30% 5%	800
	11th to 20th	Night	15% 11% 39% 30% 4	784
	21st to end	Night	13% 13% 45% 27% 2	660
March	1st to 10th	Night	13% 12% 42% 30% 3	690
	11th to 20th	Night	15% 12% 40% 27% 6%	600
	21st to end	Night	7% 12% 48% 28% 5%	660
April	1st to 10th	Night	10% 13% 50% 24% 4	600
	11th to 20th	Night	10% 12% 48% 27% 2	593
	21st to end	Night	11% 10% 44% 28% 7%	600
May	1st to 10th	Night	10% 9% 46% 29% 6%	600
	11th to 20th	Night	8% 6% 39% 34% 12% 1	591
	21st to end	Night	6% 4 38% 38% 13% 1	650
June	1st to 10th	Night	5% 2 25% 47% 20% 1	600
	11th to 20th	Night	4 2 28% 55% 11%	600
	21st to end	Night	3 1 22% 51% 22% 1	600
July	1st to 10th	Night	5% 1 12% 44% 34% 3	585
	11th to 20th	Night	2 1 9% 54% 32% 1	582
	21st to end	Night	2 6% 50% 40% 2	657
August	1st to 10th	Night	2 1 7% 55% 35% 1	597
	11th to 20th	Night	5% 1 8% 49% 36% 2	594
	21st to end	Night	4 1 6% 46% 41% 3	660
September	1st to 10th	Night	9% 2 12% 44% 31% 3	600
	11th to 20th	Night	10% 1 17% 43% 28% 1	600
	21st to end	Night	9% 2 18% 48% 22% 2	600
October	1st to 10th	Night	6% 3 24% 44% 22% 1	600
	11th to 20th	Night	9% 5% 32% 40% 14%	733
	21st to end	Night	11% 7% 32% 36% 13% 1	836
November	1st to 10th	Night	11% 4 33% 39% 12% 2	889
	11th to 20th	Night	6% 8% 37% 36% 12% 1	1000
	21st to end	Night	13% 8% 37% 32% 10% 1	1000
December	1st to 10th	Night	11% 8% 35% 39% 8%	1000
	11th to 20th	Night	14% 8% 38% 35% 5%	1000
	21st to end	Night	12% 9% 40% 32% 7%	1100

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