Wakonda area (Bethel Township)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Wakonda area (Bethel Township) clear sky chart from 2005-11-06 to 2025-09-04.

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	11% 7% 3 7% 4 4 4 4 5% 7% 43%	125997
	Night	10% 7% 3 7% 4 4 4 4 5% 7% 46%	122975
Transparency	Day	39% 6% 14% 25% 15% 2	129592
	Night	36% 6% 13% 26% 16% 2	127448
Seeing	Day	15% 9% 30% 30% 13% 3	17111
	Night	13% 8% 34% 34% 10% 1	26906

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% 12% 5% 16% 9% 8% 6% 4 4 5% 23%	3638
	11th to 20th	Day	6% 12% 4 9% 7% 5% 6% 4 7% 8% 33%	3843
	21st to end	Day	4 10% 6% 12% 6% 6% 5% 4 5% 5% 38%	4488
February	1st to 10th	Day	10% 11% 4 11% 7% 8% 7% 3 5% 6% 29%	1800
	11th to 20th	Day	9% 12% 4 8% 5% 4 5% 3 5% 7% 37%	1806
	21st to end	Day	11% 10% 3 8% 6% 5% 4 4 5% 6% 37%	1650
March	1st to 10th	Day	11% 8% 4 7% 4 3 3 3 4 5% 48%	4735
	11th to 20th	Day	8% 8% 2 5% 3 3 3 3 5% 7% 52%	4980
	21st to end	Day	22% 11% 4 11% 5% 4 4 3 5% 6% 25%	5462
April	1st to 10th	Day	16% 8% 3 7% 5% 4 4 4 5% 6% 39%	2256
	11th to 20th	Day	17% 9% 2 6% 4 4 4 3 5% 5% 40%	2572
	21st to end	Day	21% 7% 2 6% 4 4 4 3 4 6% 39%	2600
May	1st to 10th	Day	11% 5% 2 5% 4 4 5% 4 6% 7% 47%	5862
	11th to 20th	Day	14% 6% 2 5% 3 3 3 3 4 5% 50%	5862
	21st to end	Day	19% 7% 3 6% 4 4 4 4 5% 6% 37%	6744
June	1st to 10th	Day	10% 5% 2 5% 4 3 4 4 6% 8% 49%	2885
	11th to 20th	Day	12% 6% 2 5% 4 4 4 3 6% 7% 47%	3000
	21st to end	Day	8% 5% 2 5% 4 4 5% 4 6% 8% 50%	3000
July	1st to 10th	Day	8% 4 2 6% 4 5% 5% 4 7% 9% 46%	6578
	11th to 20th	Day	8% 5% 2 6% 4 3 4 3 5% 8% 52%	6218
	21st to end	Day	6% 5% 2 6% 3 4 5% 5% 7% 9% 49%	6422
August	1st to 10th	Day	7% 6% 2 6% 5% 4 5% 4 6% 8% 47%	4234
	11th to 20th	Day	17% 8% 2 6% 4 4 4 4 5% 7% 39%	4171
	21st to end	Day	8% 5% 2 5% 4 4 3 3 5% 7% 54%	4675
September	1st to 10th	Day	14% 5% 1 4 4 4 3 3 4 6% 53%	2226
	11th to 20th	Day	8% 4 1 4 4 4 4 3 5% 7% 55%	2090
	21st to end	Day	10% 5% 1 4 3 3 4 3 5% 6% 56%	2090
October	1st to 10th	Day	15% 6% 2 5% 3 3 4 2 3 6% 51%	1976
	11th to 20th	Day	12% 6% 2 5% 3 2 2 3 4 6% 54%	1900
	21st to end	Day	15% 7% 3 6% 3 4 3 3 4 6% 47%	2005
November	1st to 10th	Day	9% 6% 3 5% 4 4 5% 4 6% 7% 48%	1763
	11th to 20th	Day	9% 9% 2 8% 5% 4 4 3 5% 6% 45%	1715
	21st to end	Day	10% 8% 3 7% 5% 3 4 4 5% 8% 42%	1600
December	1st to 10th	Day	5% 6% 4 8% 6% 5% 5% 4 6% 8% 43%	2610
	11th to 20th	Day	9% 11% 4 9% 5% 5% 5% 4 5% 6% 35%	3008
	21st to end	Day	13% 11% 4 15% 5% 4 4 3 5% 7% 29%	3533
January	1st to 10th	Night	9% 11% 4 13% 10% 7% 6% 4 6% 7% 23%	6327
	11th to 20th	Night	3 9% 4 10% 6% 6% 6% 4 8% 6% 37%	6120
	21st to end	Night	4 9% 5% 10% 4 5% 4 4 7% 7% 41%	6490
February	1st to 10th	Night	10% 10% 3 8% 7% 5% 4 4 5% 7% 38%	2600
	11th to 20th	Night	8% 11% 4 9% 4 3 4 4 5% 7% 42%	2498
	21st to end	Night	9% 8% 3 6% 4 4 5% 4 6% 6% 46%	1980
March	1st to 10th	Night	12% 6% 2 5% 3 3 3 3 5% 6% 53%	5126
	11th to 20th	Night	11% 6% 2 5% 3 3 3 3 5% 8% 51%	4980
	21st to end	Night	16% 10% 3 8% 5% 5% 4 3 5% 6% 35%	5467
April	1st to 10th	Night	14% 8% 3 6% 4 4 4 4 5% 6% 42%	2140
	11th to 20th	Night	15% 8% 2 6% 4 3 3 3 5% 7% 43%	1779
	21st to end	Night	19% 7% 3 5% 3 3 4 3 4 6% 43%	1800
May	1st to 10th	Night	12% 4 2 5% 3 3 3 3 4 7% 54%	4053
	11th to 20th	Night	13% 6% 2 4 3 3 3 3 4 7% 52%	4053
	21st to end	Night	18% 6% 2 5% 3 4 4 3 5% 8% 41%	4133
June	1st to 10th	Night	8% 4 2 4 4 3 3 3 6% 9% 54%	1510
	11th to 20th	Night	7% 4 2 4 4 3 4 4 7% 8% 53%	1400
	21st to end	Night	8% 4 1 3 3 4 4 3 7% 8% 56%	1400
July	1st to 10th	Night	7% 4 2 5% 4 4 4 3 6% 9% 52%	3396
	11th to 20th	Night	8% 4 2 4 3 3 4 3 5% 6% 56%	3742
	21st to end	Night	5% 3 2 4 3 3 4 4 6% 10% 55%	4449
August	1st to 10th	Night	5% 5% 3 5% 4 5% 4 4 6% 11% 49%	2926
	11th to 20th	Night	10% 5% 2 5% 3 3 4 4 6% 8% 50%	2888
	21st to end	Night	6% 3 2 5% 3 4 3 4 6% 9% 54%	3234
September	1st to 10th	Night	9% 4 2 5% 2 3 4 3 5% 6% 58%	2016
	11th to 20th	Night	8% 4 2 4 3 2 3 3 5% 7% 58%	2090
	21st to end	Night	8% 4 1 4 3 2 3 3 3 7% 61%	2090
October	1st to 10th	Night	17% 5% 2 4 3 2 3 3 4 5% 53%	2185
	11th to 20th	Night	11% 5% 3 5% 3 3 3 3 5% 6% 55%	2280
	21st to end	Night	14% 6% 2 5% 3 2 4 3 4 6% 51%	2591
November	1st to 10th	Night	9% 5% 2 6% 3 3 3 4 5% 7% 54%	2535
	11th to 20th	Night	8% 7% 2 7% 4 3 4 3 6% 6% 50%	2683
	21st to end	Night	8% 7% 2 6% 4 4 4 4 6% 6% 49%	2800
December	1st to 10th	Night	5% 7% 3 9% 6% 4 4 4 5% 7% 46%	4580
	11th to 20th	Night	9% 9% 3 9% 6% 5% 6% 5% 6% 7% 36%	5199
	21st to end	Night	15% 12% 4 12% 5% 4 4 3 5% 6% 29%	7435

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	62% 6% 13% 14% 5%	3639
	11th to 20th	Day	48% 4 14% 19% 14% 1	3843
	21st to end	Day	45% 6% 16% 21% 9% 2	4488
February	1st to 10th	Day	55% 7% 14% 15% 9% 1	1800
	11th to 20th	Day	47% 6% 13% 21% 13% 1	1815
	21st to end	Day	48% 5% 12% 21% 11% 2	1650
March	1st to 10th	Day	39% 5% 10% 32% 13% 2	4735
	11th to 20th	Day	33% 4 10% 31% 20% 2	4980
	21st to end	Day	59% 6% 14% 16% 3 2	5464
April	1st to 10th	Day	45% 6% 12% 24% 12% 2	2256
	11th to 20th	Day	45% 6% 11% 22% 14% 2	2572
	21st to end	Day	46% 6% 12% 22% 13% 1	2600
May	1st to 10th	Day	33% 7% 11% 24% 24% 1	5900
	11th to 20th	Day	35% 5% 11% 23% 16% 9%	5866
	21st to end	Day	45% 7% 11% 23% 13% 1	6758
June	1st to 10th	Day	32% 8% 16% 29% 13% 2	2885
	11th to 20th	Day	35% 7% 15% 24% 16% 3	3000
	21st to end	Day	30% 7% 16% 29% 15% 3	3000
July	1st to 10th	Day	31% 8% 18% 28% 14% 1	6508
	11th to 20th	Day	31% 7% 12% 31% 17% 3	6143
	21st to end	Day	29% 9% 17% 27% 16% 2	6240
August	1st to 10th	Day	32% 7% 16% 29% 13% 2	4220
	11th to 20th	Day	43% 7% 13% 26% 10% 1	4210
	21st to end	Day	29% 7% 15% 27% 18% 3	4674
September	1st to 10th	Day	34% 5% 11% 29% 19% 3	2226
	11th to 20th	Day	28% 6% 14% 33% 18% 1	2090
	21st to end	Day	27% 7% 11% 31% 22% 2	2090
October	1st to 10th	Day	23% 3 7% 25% 37% 4	3288
	11th to 20th	Day	26% 4 16% 28% 21% 6%	3140
	21st to end	Day	36% 5% 13% 26% 18% 3	3286
November	1st to 10th	Day	34% 5% 18% 26% 15% 2	1763
	11th to 20th	Day	40% 5% 14% 26% 14% 2	1715
	21st to end	Day	40% 6% 16% 24% 13% 1	1600
December	1st to 10th	Day	38% 6% 17% 28% 10% 1	2610
	11th to 20th	Day	48% 7% 18% 20% 7%	3005
	21st to end	Day	54% 5% 13% 22% 6% 1	3533
January	1st to 10th	Night	59% 6% 12% 15% 8%	6327
	11th to 20th	Night	43% 6% 15% 20% 15% 2	6120
	21st to end	Night	39% 6% 13% 26% 15%	6490
February	1st to 10th	Night	46% 6% 14% 22% 11% 1	2600
	11th to 20th	Night	42% 5% 14% 23% 12% 4	2499
	21st to end	Night	39% 5% 13% 26% 13% 4	1980
March	1st to 10th	Night	32% 5% 10% 31% 21% 1	5126
	11th to 20th	Night	31% 4 9% 29% 23% 3	4980
	21st to end	Night	48% 7% 14% 22% 6% 1	5467
April	1st to 10th	Night	41% 7% 13% 24% 15% 1	2140
	11th to 20th	Night	40% 5% 10% 25% 18% 2	1779
	21st to end	Night	43% 6% 12% 24% 13% 2	1800
May	1st to 10th	Night	30% 6% 12% 27% 24% 1	4080
	11th to 20th	Night	32% 6% 12% 21% 21% 9%	4054
	21st to end	Night	40% 6% 11% 29% 13% 1	4141
June	1st to 10th	Night	26% 7% 16% 30% 17% 4	1510
	11th to 20th	Night	27% 6% 17% 25% 21% 4	1400
	21st to end	Night	24% 7% 15% 31% 19% 3	1400
July	1st to 10th	Night	28% 6% 18% 32% 14% 2	3359
	11th to 20th	Night	27% 6% 12% 35% 16% 3	3697
	21st to end	Night	22% 9% 21% 29% 16% 3	4320
August	1st to 10th	Night	29% 7% 16% 30% 16% 2	2916
	11th to 20th	Night	31% 7% 16% 29% 14% 2	2915
	21st to end	Night	26% 7% 17% 23% 22% 4	3234
September	1st to 10th	Night	27% 6% 12% 28% 23% 5%	2016
	11th to 20th	Night	24% 6% 14% 32% 21% 2	2090
	21st to end	Night	24% 5% 11% 32% 25% 4	2090
October	1st to 10th	Night	20% 3 6% 20% 47% 4	3640
	11th to 20th	Night	23% 3 11% 31% 27% 4	3779
	21st to end	Night	36% 5% 12% 29% 17% 1	4265
November	1st to 10th	Night	29% 6% 15% 24% 22% 4	2535
	11th to 20th	Night	35% 4 14% 26% 18% 3	2683
	21st to end	Night	34% 5% 16% 28% 16% 1	2800
December	1st to 10th	Night	38% 5% 15% 32% 11%	4580
	11th to 20th	Night	45% 7% 16% 24% 7%	5201
	21st to end	Night	55% 5% 12% 21% 7%	7435

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	17% 10% 29% 29% 14% 2	300
	11th to 20th	Day	18% 12% 33% 28% 7% 2	300
	21st to end	Day	14% 10% 40% 25% 10% 2	330
February	1st to 10th	Day	14% 18% 37% 28% 4	300
	11th to 20th	Day	13% 13% 39% 27% 7% 1	300
	21st to end	Day	18% 13% 38% 27% 4	249
March	1st to 10th	Day	14% 14% 40% 25% 5% 1	300
	11th to 20th	Day	20% 10% 38% 24% 8% 1	300
	21st to end	Day	30% 12% 35% 17% 4 2	330
April	1st to 10th	Day	23% 17% 36% 19% 3 1	356
	11th to 20th	Day	24% 16% 30% 23% 7%	690
	21st to end	Day	26% 13% 30% 21% 9% 2	700
May	1st to 10th	Day	18% 11% 32% 25% 12% 2	703
	11th to 20th	Day	18% 10% 29% 24% 16% 3	725
	21st to end	Day	19% 9% 30% 28% 11% 3	789
June	1st to 10th	Day	10% 8% 22% 35% 20% 5%	730
	11th to 20th	Day	12% 8% 34% 29% 15% 2	730
	21st to end	Day	11% 8% 31% 33% 15% 2	730
July	1st to 10th	Day	7% 4 20% 38% 25% 6%	721
	11th to 20th	Day	7% 5% 29% 37% 18% 4	718
	21st to end	Day	5% 3 26% 43% 19% 4	794
August	1st to 10th	Day	9% 3 25% 38% 21% 4	726
	11th to 20th	Day	11% 4 23% 35% 21% 6%	715
	21st to end	Day	8% 4 24% 37% 23% 4	803
September	1st to 10th	Day	17% 5% 25% 32% 17% 5%	412
	11th to 20th	Day	6% 6% 35% 30% 19% 4	300
	21st to end	Day	16% 9% 31% 28% 13% 4	300
October	1st to 10th	Day	17% 8% 27% 29% 14% 5%	300
	11th to 20th	Day	18% 13% 35% 25% 9% 1	300
	21st to end	Day	21% 13% 35% 24% 7% 1	330
November	1st to 10th	Day	18% 12% 33% 25% 9% 4	300
	11th to 20th	Day	14% 18% 38% 22% 6%	300
	21st to end	Day	20% 16% 28% 27% 8% 1	300
December	1st to 10th	Day	12% 12% 38% 26% 9% 2	300
	11th to 20th	Day	15% 13% 41% 22% 8%	300
	21st to end	Day	24% 8% 36% 26% 5% 1	330
January	1st to 10th	Night	11% 10% 36% 33% 9% 1	1000
	11th to 20th	Night	11% 15% 34% 32% 8% 1	1000
	21st to end	Night	13% 10% 40% 30% 7%	1100
February	1st to 10th	Night	15% 11% 39% 28% 6%	1000
	11th to 20th	Night	14% 11% 39% 30% 6%	944
	21st to end	Night	14% 9% 36% 33% 7% 1	660
March	1st to 10th	Night	13% 9% 41% 31% 5% 1	695
	11th to 20th	Night	15% 10% 38% 32% 5%	600
	21st to end	Night	20% 11% 40% 23% 7%	660
April	1st to 10th	Night	19% 12% 38% 28% 3	600
	11th to 20th	Night	20% 14% 36% 24% 6% 1	593
	21st to end	Night	22% 9% 36% 26% 7% 1	600
May	1st to 10th	Night	15% 8% 35% 32% 10% 1	600
	11th to 20th	Night	15% 8% 31% 34% 11%	591
	21st to end	Night	19% 5% 31% 34% 11%	650
June	1st to 10th	Night	9% 6% 26% 44% 16% 1	600
	11th to 20th	Night	9% 4 36% 40% 11%	600
	21st to end	Night	8% 5% 27% 44% 16%	600
July	1st to 10th	Night	7% 3 19% 44% 25% 1	585
	11th to 20th	Night	5% 2 24% 52% 16% 1	582
	21st to end	Night	3 1 23% 56% 17%	657
August	1st to 10th	Night	7% 3 24% 46% 20% 1	597
	11th to 20th	Night	9% 3 23% 41% 22% 1	594
	21st to end	Night	6% 3 26% 45% 18% 1	660
September	1st to 10th	Night	10% 5% 25% 42% 17% 1	579
	11th to 20th	Night	10% 4 32% 39% 14% 2	570
	21st to end	Night	9% 6% 36% 34% 14% 1	570
October	1st to 10th	Night	17% 8% 30% 32% 11% 1	665
	11th to 20th	Night	14% 13% 35% 31% 7%	760
	21st to end	Night	17% 12% 30% 31% 9%	919
November	1st to 10th	Night	13% 8% 37% 32% 9% 1	975
	11th to 20th	Night	12% 12% 38% 31% 7%	1000
	21st to end	Night	12% 9% 37% 33% 8%	1000
December	1st to 10th	Night	13% 10% 38% 33% 6%	1000
	11th to 20th	Night	15% 9% 34% 33% 8%	1000
	21st to end	Night	22% 9% 34% 28% 7%	1100

Page generated at 2025-09-01 00:51:05. Version ac07

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