Honey Creek State Natural Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Honey Creek State Natural Area clear sky chart from 2005-11-06 to 2025-01-22.

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 5% 4 4 4 3 5% 7% 46%	105240
	Night	15% 6% 2 5% 3 3 3 3 4 6% 50%	104259
Transparency	Day	38% 3 9% 22% 19% 10%	109071
	Night	36% 3 10% 20% 20% 12%	108555
Seeing	Day	15% 8% 23% 30% 20% 4	15031
	Night	17% 7% 25% 35% 14% 1	25085

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	14% 7% 3 4 3 2 3 2 4 5% 52%	2937
	11th to 20th	Day	17% 6% 1 3 2 2 2 2 4 5% 56%	2940
	21st to end	Day	17% 8% 2 5% 3 3 3 2 5% 8% 44%	3435
February	1st to 10th	Day	19% 7% 2 6% 3 3 4 2 4 5% 45%	1900
	11th to 20th	Day	17% 7% 2 4 4 4 4 3 4 5% 45%	1849
	21st to end	Day	18% 7% 2 4 3 2 2 3 4 5% 50%	1570
March	1st to 10th	Day	16% 8% 3 6% 4 4 4 3 4 6% 44%	3365
	11th to 20th	Day	21% 11% 3 8% 5% 4 4 3 4 4 33%	3480
	21st to end	Day	16% 7% 2 5% 3 3 3 3 5% 6% 45%	3814
April	1st to 10th	Day	15% 7% 3 7% 4 4 3 3 4 6% 44%	2090
	11th to 20th	Day	21% 7% 2 5% 3 3 4 3 4 5% 42%	2096
	21st to end	Day	15% 7% 2 6% 5% 4 4 3 4 5% 44%	2393
May	1st to 10th	Day	23% 9% 3 7% 4 4 4 3 5% 5% 32%	4082
	11th to 20th	Day	15% 6% 2 6% 4 4 4 3 5% 6% 43%	4082
	21st to end	Day	12% 6% 2 7% 5% 5% 6% 5% 7% 9% 37%	4477
June	1st to 10th	Day	6% 5% 2 5% 4 6% 5% 5% 7% 9% 46%	2470
	11th to 20th	Day	8% 6% 2 6% 4 6% 5% 4 6% 8% 45%	2470
	21st to end	Day	8% 6% 3 7% 6% 6% 6% 5% 8% 8% 39%	2470
July	1st to 10th	Day	8% 4 2 6% 5% 5% 5% 5% 5% 8% 46%	4120
	11th to 20th	Day	5% 4 1 5% 4 5% 5% 5% 7% 11% 48%	4120
	21st to end	Day	9% 5% 2 6% 5% 6% 6% 5% 7% 10% 39%	4465
August	1st to 10th	Day	1 2 1 2 2 3 3 3 5% 9% 68%	3993
	11th to 20th	Day	4 3 1 4 3 3 3 3 6% 10% 59%	3726
	21st to end	Day	4 4 2 5% 5% 6% 5% 5% 8% 11% 47%	4034
September	1st to 10th	Day	10% 8% 3 7% 5% 5% 4 4 6% 5% 44%	2090
	11th to 20th	Day	12% 6% 2 6% 6% 4 5% 5% 6% 10% 39%	2090
	21st to end	Day	8% 4 2 5% 4 5% 5% 3 6% 7% 50%	2090
October	1st to 10th	Day	7% 4 2 5% 4 4 4 3 5% 6% 56%	2090
	11th to 20th	Day	13% 5% 2 5% 3 4 4 3 4 7% 51%	1990
	21st to end	Day	12% 4 2 4 3 3 3 2 4 5% 58%	2090
November	1st to 10th	Day	14% 8% 3 6% 4 3 4 3 5% 5% 44%	1958
	11th to 20th	Day	13% 6% 2 5% 3 4 4 3 4 6% 50%	1845
	21st to end	Day	17% 7% 2 5% 4 3 3 3 4 5% 45%	1800
December	1st to 10th	Day	27% 7% 3 6% 3 2 2 2 3 5% 39%	2940
	11th to 20th	Day	17% 8% 2 5% 4 3 4 3 4 5% 44%	3391
	21st to end	Day	14% 6% 2 4 3 2 2 2 3 3 59%	4488
January	1st to 10th	Night	19% 6% 2 4 2 2 2 2 3 6% 52%	4238
	11th to 20th	Night	14% 4 1 3 2 2 2 1 3 4 65%	4250
	21st to end	Night	20% 7% 2 6% 3 3 3 3 4 6% 43%	4284
February	1st to 10th	Night	18% 8% 2 4 3 3 3 2 4 5% 48%	2280
	11th to 20th	Night	19% 8% 2 4 2 2 2 2 3 5% 50%	2218
	21st to end	Night	20% 6% 2 4 3 4 3 3 4 5% 46%	1884
March	1st to 10th	Night	17% 9% 2 6% 4 4 3 4 4 6% 41%	3489
	11th to 20th	Night	23% 11% 3 6% 4 4 3 3 4 5% 35%	3480
	21st to end	Night	19% 7% 3 5% 3 3 3 3 4 6% 44%	3817
April	1st to 10th	Night	15% 7% 2 5% 4 3 4 3 5% 7% 46%	2090
	11th to 20th	Night	19% 7% 2 5% 3 3 3 3 3 5% 45%	2027
	21st to end	Night	21% 6% 2 5% 4 2 3 2 4 4 47%	1786
May	1st to 10th	Night	27% 10% 2 5% 3 4 3 2 4 5% 37%	2823
	11th to 20th	Night	13% 5% 2 5% 4 3 3 4 4 7% 49%	2823
	21st to end	Night	14% 7% 2 5% 4 4 4 3 6% 8% 44%	3090
June	1st to 10th	Night	7% 4 1 4 2 3 2 3 5% 9% 60%	1710
	11th to 20th	Night	6% 3 1 4 4 4 3 3 5% 9% 57%	1710
	21st to end	Night	9% 5% 2 4 3 3 4 4 7% 9% 50%	1710
July	1st to 10th	Night	6% 4 1 4 3 4 4 4 6% 10% 53%	2850
	11th to 20th	Night	4 3 1 5% 3 4 5% 4 7% 10% 53%	2850
	21st to end	Night	11% 8% 3 5% 4 4 5% 4 7% 9% 41%	3098
August	1st to 10th	Night	2 1 1 2 2 2 2 2 4 7% 73%	2928
	11th to 20th	Night	3 3 1 3 3 3 3 4 6% 11% 60%	3113
	21st to end	Night	5% 4 1 4 3 4 4 4 7% 10% 54%	3628
September	1st to 10th	Night	10% 5% 3 5% 4 3 4 4 5% 7% 50%	2090
	11th to 20th	Night	11% 6% 2 7% 3 4 4 4 6% 9% 45%	2090
	21st to end	Night	8% 5% 2 4 4 4 4 3 5% 9% 52%	2090
October	1st to 10th	Night	6% 4 1 4 3 3 3 3 4 7% 60%	2090
	11th to 20th	Night	14% 4 2 5% 3 3 3 3 4 6% 54%	2169
	21st to end	Night	15% 4 1 3 2 2 2 2 3 4 61%	2508
November	1st to 10th	Night	15% 6% 2 6% 4 3 3 2 3 5% 52%	2340
	11th to 20th	Night	12% 6% 2 4 3 3 3 3 4 6% 55%	2550
	21st to end	Night	18% 6% 1 4 3 3 4 2 4 6% 48%	2600
December	1st to 10th	Night	24% 8% 2 6% 3 3 3 2 4 5% 39%	4250
	11th to 20th	Night	21% 9% 2 5% 3 2 2 2 3 4 47%	4816
	21st to end	Night	17% 6% 2 3 2 2 2 2 3 4 57%	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	38% 1 2 17% 25% 16%	2938
	11th to 20th	Day	34% 1 5% 14% 27% 18%	2940
	21st to end	Day	42% 1 4 13% 30% 11%	3435
February	1st to 10th	Day	44% 1 4 14% 21% 16%	1900
	11th to 20th	Day	43% 2 6% 18% 19% 13%	1859
	21st to end	Day	40% 2 6% 18% 19% 16%	1570
March	1st to 10th	Day	45% 1 5% 16% 21% 11%	3365
	11th to 20th	Day	57% 2 6% 10% 16% 9%	3480
	21st to end	Day	41% 1 8% 17% 21% 12%	3814
April	1st to 10th	Day	43% 3 7% 17% 17% 12%	2090
	11th to 20th	Day	46% 2 5% 17% 18% 12%	2096
	21st to end	Day	45% 2 4 22% 17% 10%	2393
May	1st to 10th	Day	56% 2 7% 15% 14% 5%	4120
	11th to 20th	Day	43% 2 8% 19% 21% 7%	4086
	21st to end	Day	43% 2 9% 33% 12% 1	4489
June	1st to 10th	Day	34% 4 11% 28% 20% 3	2470
	11th to 20th	Day	36% 3 10% 26% 19% 4	2470
	21st to end	Day	41% 4 10% 26% 15% 3	2470
July	1st to 10th	Day	34% 4 16% 38% 6% 1	4056
	11th to 20th	Day	29% 6% 18% 30% 15% 1	4051
	21st to end	Day	38% 6% 17% 30% 9%	4325
August	1st to 10th	Day	15% 3 11% 45% 25% 1	3979
	11th to 20th	Day	20% 4 25% 37% 11% 2	3762
	21st to end	Day	31% 8% 16% 26% 18% 2	4033
September	1st to 10th	Day	42% 4 9% 21% 16% 8%	2090
	11th to 20th	Day	40% 6% 10% 20% 19% 5%	2090
	21st to end	Day	33% 3 9% 23% 18% 13%	2090
October	1st to 10th	Day	19% 2 6% 13% 25% 36%	3480
	11th to 20th	Day	26% 3 7% 19% 24% 21%	3282
	21st to end	Day	29% 3 5% 18% 33% 14%	3428
November	1st to 10th	Day	43% 3 5% 20% 18% 11%	1958
	11th to 20th	Day	37% 2 7% 18% 21% 16%	1845
	21st to end	Day	44% 2 4 17% 20% 14%	1800
December	1st to 10th	Day	52% 2 4 19% 13% 10%	2940
	11th to 20th	Day	43% 3 7% 13% 21% 13%	3389
	21st to end	Day	33% 1 4 16% 29% 17%	4488
January	1st to 10th	Night	38% 1 3 15% 23% 20%	4238
	11th to 20th	Night	27% 1 3 18% 28% 22%	4250
	21st to end	Night	45% 1 2 12% 26% 12%	4284
February	1st to 10th	Night	41% 2 5% 13% 22% 18%	2280
	11th to 20th	Night	41% 2 4 17% 20% 16%	2218
	21st to end	Night	42% 2 5% 16% 19% 16%	1884
March	1st to 10th	Night	48% 1 5% 16% 19% 10%	3489
	11th to 20th	Night	56% 1 7% 12% 14% 10%	3480
	21st to end	Night	44% 2 8% 16% 21% 10%	3817
April	1st to 10th	Night	39% 2 9% 19% 16% 15%	2090
	11th to 20th	Night	44% 2 7% 15% 18% 15%	2027
	21st to end	Night	43% 2 8% 20% 17% 10%	1786
May	1st to 10th	Night	53% 1 7% 17% 14% 7%	2850
	11th to 20th	Night	37% 2 10% 24% 19% 7%	2824
	21st to end	Night	41% 3 13% 30% 12% 2	3099
June	1st to 10th	Night	25% 3 16% 32% 21% 3	1710
	11th to 20th	Night	27% 3 13% 31% 21% 5%	1710
	21st to end	Night	31% 4 18% 29% 15% 3	1710
July	1st to 10th	Night	25% 7% 25% 37% 6% 1	2805
	11th to 20th	Night	27% 8% 20% 30% 15% 1	2796
	21st to end	Night	39% 6% 22% 26% 7%	2999
August	1st to 10th	Night	12% 3 17% 47% 21% 1	2918
	11th to 20th	Night	19% 5% 32% 34% 8% 2	3143
	21st to end	Night	25% 9% 22% 26% 16% 2	3628
September	1st to 10th	Night	35% 4 15% 22% 17% 8%	2090
	11th to 20th	Night	37% 6% 15% 22% 15% 5%	2090
	21st to end	Night	31% 4 13% 22% 18% 12%	2090
October	1st to 10th	Night	17% 2 7% 16% 21% 37%	3480
	11th to 20th	Night	23% 2 9% 16% 30% 19%	3603
	21st to end	Night	27% 1 5% 18% 32% 15%	4120
November	1st to 10th	Night	38% 2 7% 19% 21% 13%	2340
	11th to 20th	Night	33% 3 8% 19% 20% 17%	2550
	21st to end	Night	39% 2 7% 18% 19% 15%	2600
December	1st to 10th	Night	51% 3 5% 15% 15% 11%	4250
	11th to 20th	Night	45% 2 5% 10% 21% 18%	4817
	21st to end	Night	36% 1 3 14% 29% 18%	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	22% 18% 34% 20% 6%	300
	11th to 20th	Day	24% 16% 29% 23% 7% 1	300
	21st to end	Day	20% 16% 36% 21% 6%	300
February	1st to 10th	Day	29% 17% 28% 21% 5%	270
	11th to 20th	Day	28% 20% 32% 15% 4	270
	21st to end	Day	25% 20% 41% 12%	225
March	1st to 10th	Day	22% 16% 44% 16% 2	270
	11th to 20th	Day	22% 16% 41% 16% 5%	270
	21st to end	Day	23% 17% 39% 18% 3 1	297
April	1st to 10th	Day	20% 17% 43% 17% 3	270
	11th to 20th	Day	24% 15% 37% 20% 4	294
	21st to end	Day	20% 14% 40% 22% 5%	573
May	1st to 10th	Day	22% 12% 35% 25% 5%	653
	11th to 20th	Day	20% 7% 29% 34% 8% 2	675
	21st to end	Day	18% 7% 30% 33% 12% 1	734
June	1st to 10th	Day	9% 4 18% 40% 26% 3	680
	11th to 20th	Day	10% 2 16% 48% 21% 2	680
	21st to end	Day	9% 4 12% 40% 29% 6%	680
July	1st to 10th	Day	10% 3 11% 34% 33% 9%	671
	11th to 20th	Day	7% 1 6% 37% 43% 6%	668
	21st to end	Day	5% 2 6% 36% 42% 9%	739
August	1st to 10th	Day	3 1 5% 36% 42% 12%	617
	11th to 20th	Day	7% 1 5% 39% 39% 9%	477
	21st to end	Day	4 2 6% 31% 41% 16%	458
September	1st to 10th	Day	11% 3 10% 26% 37% 13%	300
	11th to 20th	Day	5% 2 5% 31% 44% 13%	300
	21st to end	Day	7% 2 8% 34% 35% 13%	300
October	1st to 10th	Day	6% 1 15% 41% 30% 7%	300
	11th to 20th	Day	10% 5% 20% 44% 18% 4	300
	21st to end	Day	21% 11% 26% 24% 15% 3	330
November	1st to 10th	Day	18% 8% 30% 29% 13% 3	300
	11th to 20th	Day	22% 8% 32% 24% 11% 2	300
	21st to end	Day	23% 18% 32% 16% 9% 2	300
December	1st to 10th	Day	20% 8% 35% 25% 8% 3	300
	11th to 20th	Day	22% 15% 32% 23% 6% 1	300
	21st to end	Day	21% 10% 39% 22% 7% 1	330
January	1st to 10th	Night	21% 10% 29% 32% 8% 1	1000
	11th to 20th	Night	21% 12% 31% 29% 7%	1000
	21st to end	Night	24% 11% 29% 30% 6%	893
February	1st to 10th	Night	25% 13% 29% 27% 5%	760
	11th to 20th	Night	28% 13% 32% 25% 3	744
	21st to end	Night	26% 13% 39% 21% 1	628
March	1st to 10th	Night	23% 13% 35% 26% 3	618
	11th to 20th	Night	24% 10% 35% 27% 4	570
	21st to end	Night	19% 11% 41% 24% 4 1	627
April	1st to 10th	Night	16% 15% 39% 26% 4	570
	11th to 20th	Night	23% 12% 39% 24% 2	563
	21st to end	Night	24% 7% 40% 22% 6% 1	570
May	1st to 10th	Night	19% 10% 41% 26% 4	570
	11th to 20th	Night	16% 6% 37% 33% 8%	561
	21st to end	Night	17% 7% 33% 34% 9%	617
June	1st to 10th	Night	8% 3 24% 43% 20% 1	570
	11th to 20th	Night	7% 1 33% 46% 12% 1	570
	21st to end	Night	8% 2 19% 44% 24% 3	570
July	1st to 10th	Night	10% 3 12% 45% 28% 3	555
	11th to 20th	Night	3 1 11% 54% 28% 3	552
	21st to end	Night	8% 2 9% 50% 28% 3	624
August	1st to 10th	Night	2 1 10% 51% 33% 3	567
	11th to 20th	Night	6% 1 8% 52% 30% 4	564
	21st to end	Night	7% 2 5% 44% 36% 5%	627
September	1st to 10th	Night	11% 1 9% 42% 33% 5%	570
	11th to 20th	Night	13% 1 9% 40% 33% 4	570
	21st to end	Night	12% 1 12% 35% 36% 5%	570
October	1st to 10th	Night	8% 3 11% 48% 26% 4	570
	11th to 20th	Night	14% 4 20% 41% 18% 2	649
	21st to end	Night	16% 9% 21% 32% 20% 2	836
November	1st to 10th	Night	16% 7% 20% 39% 16% 2	780
	11th to 20th	Night	16% 8% 24% 37% 14% 1	950
	21st to end	Night	22% 10% 26% 30% 11% 1	1000
December	1st to 10th	Night	21% 9% 25% 34% 10% 1	1000
	11th to 20th	Night	26% 10% 26% 32% 7%	1000
	21st to end	Night	21% 9% 27% 35% 8%	1100

Page generated at 2025-01-19 02:06:45. Version ac07

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