Camp Kawartha
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Camp Kawartha clear sky chart from 2005-11-06 to 2024-11-02.

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	16% 10% 3 8% 5% 4 4 4 5% 7% 34%	101526
	Night	16% 11% 4 8% 5% 4 4 4 5% 6% 33%	97456
Transparency	Day	48% 8% 13% 20% 10% 1	101285
	Night	49% 8% 13% 19% 10% 1	97316
Seeing	Day	22% 16% 31% 19% 8% 3	14427
	Night	21% 14% 31% 24% 10% 1	23674

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	16% 17% 6% 10% 5% 4 4 3 4 5% 27%	2517
	11th to 20th	Day	11% 17% 7% 16% 7% 6% 6% 3 4 4 19%	2561
	21st to end	Day	20% 20% 6% 12% 6% 5% 4 2 3 4 19%	3124
February	1st to 10th	Day	14% 16% 5% 12% 8% 5% 5% 4 4 4 22%	1710
	11th to 20th	Day	12% 15% 6% 13% 6% 5% 4 3 3 4 28%	1663
	21st to end	Day	17% 15% 4 10% 8% 5% 4 3 4 6% 24%	1479
March	1st to 10th	Day	21% 13% 4 8% 5% 4 3 3 4 6% 30%	3361
	11th to 20th	Day	11% 17% 5% 10% 5% 5% 5% 4 5% 6% 27%	3480
	21st to end	Day	14% 9% 3 5% 4 4 4 3 5% 6% 44%	3864
April	1st to 10th	Day	21% 12% 3 7% 4 4 4 3 5% 6% 31%	2280
	11th to 20th	Day	23% 9% 3 5% 5% 3 4 2 4 5% 37%	2266
	21st to end	Day	21% 10% 2 7% 4 4 4 3 4 6% 33%	2470
May	1st to 10th	Day	20% 7% 2 7% 5% 5% 4 4 5% 7% 35%	4263
	11th to 20th	Day	16% 10% 3 7% 5% 4 5% 4 6% 8% 32%	4398
	21st to end	Day	13% 7% 2 6% 5% 4 4 4 5% 8% 43%	4837
June	1st to 10th	Day	17% 8% 3 7% 5% 5% 5% 4 6% 8% 32%	2660
	11th to 20th	Day	14% 6% 2 6% 5% 5% 6% 4 7% 8% 38%	2660
	21st to end	Day	16% 8% 3 7% 5% 4 5% 4 6% 7% 36%	2660
July	1st to 10th	Day	11% 5% 2 6% 5% 5% 6% 4 7% 10% 38%	4440
	11th to 20th	Day	12% 5% 2 5% 4 4 5% 4 6% 9% 44%	4440
	21st to end	Day	8% 5% 2 6% 5% 5% 6% 5% 7% 9% 42%	4731
August	1st to 10th	Day	16% 8% 3 7% 4 4 5% 3 6% 7% 37%	4104
	11th to 20th	Day	16% 6% 3 7% 5% 4 5% 5% 7% 8% 35%	4044
	21st to end	Day	9% 6% 2 6% 5% 5% 4 5% 6% 9% 41%	4282
September	1st to 10th	Day	14% 7% 2 7% 5% 4 4 4 5% 8% 41%	2280
	11th to 20th	Day	11% 5% 2 6% 4 4 5% 4 6% 6% 48%	2256
	21st to end	Day	16% 7% 3 7% 4 4 3 4 5% 7% 39%	1996
October	1st to 10th	Day	17% 11% 3 9% 4 4 4 3 6% 7% 33%	1900
	11th to 20th	Day	23% 9% 2 8% 5% 5% 4 4 6% 6% 28%	1900
	21st to end	Day	25% 11% 3 9% 5% 4 4 3 4 6% 25%	2076
November	1st to 10th	Day	16% 10% 3 8% 5% 5% 4 4 5% 7% 32%	1586
	11th to 20th	Day	16% 14% 3 8% 6% 5% 5% 4 6% 6% 27%	1520
	21st to end	Day	22% 16% 4 9% 4 5% 4 3 6% 6% 21%	1520
December	1st to 10th	Day	18% 19% 6% 11% 6% 5% 4 4 4 5% 18%	1520
	11th to 20th	Day	19% 16% 5% 9% 5% 4 4 3 4 4 27%	1906
	21st to end	Day	27% 18% 6% 10% 4 4 3 2 4 4 18%	2772
January	1st to 10th	Night	18% 19% 6% 11% 6% 5% 5% 3 4 4 19%	4429
	11th to 20th	Night	14% 13% 6% 15% 8% 6% 5% 4 4 5% 20%	4395
	21st to end	Night	19% 15% 7% 12% 5% 5% 4 3 4 5% 21%	4532
February	1st to 10th	Night	12% 16% 6% 10% 7% 6% 6% 5% 5% 5% 22%	2470
	11th to 20th	Night	12% 15% 5% 11% 6% 4 5% 4 5% 5% 27%	2403
	21st to end	Night	16% 12% 4 9% 6% 5% 4 4 6% 6% 29%	1975
March	1st to 10th	Night	18% 12% 4 8% 5% 4 4 3 4 6% 31%	3476
	11th to 20th	Night	14% 15% 5% 9% 6% 5% 4 4 5% 6% 28%	3479
	21st to end	Night	16% 8% 2 6% 4 4 3 3 5% 7% 42%	3768
April	1st to 10th	Night	19% 11% 4 8% 5% 4 4 3 5% 6% 32%	1900
	11th to 20th	Night	18% 8% 4 7% 4 4 4 4 4 6% 37%	1875
	21st to end	Night	18% 8% 3 7% 5% 5% 5% 4 6% 6% 33%	1714
May	1st to 10th	Night	20% 8% 3 7% 4 4 5% 3 5% 5% 37%	2678
	11th to 20th	Night	16% 8% 2 6% 5% 5% 4 4 6% 7% 37%	2495
	21st to end	Night	10% 7% 2 6% 4 4 4 3 5% 8% 47%	2738
June	1st to 10th	Night	14% 6% 3 7% 5% 5% 4 4 6% 9% 38%	1520
	11th to 20th	Night	12% 5% 2 5% 5% 4 5% 4 5% 8% 44%	1520
	21st to end	Night	13% 7% 3 7% 5% 5% 6% 4 4 7% 39%	1520
July	1st to 10th	Night	8% 5% 2 7% 5% 5% 6% 4 6% 7% 45%	2520
	11th to 20th	Night	13% 5% 2 5% 4 3 4 3 5% 7% 49%	2520
	21st to end	Night	9% 5% 2 5% 4 3 4 4 5% 8% 50%	2818
August	1st to 10th	Night	12% 6% 2 5% 4 4 3 4 5% 8% 47%	2825
	11th to 20th	Night	15% 6% 2 5% 4 3 3 3 5% 8% 46%	2785
	21st to end	Night	10% 5% 2 5% 4 4 5% 4 5% 8% 48%	3341
September	1st to 10th	Night	11% 6% 2 6% 4 4 5% 3 6% 9% 44%	1900
	11th to 20th	Night	12% 3 1 4 4 4 4 3 5% 7% 53%	1920
	21st to end	Night	17% 6% 3 6% 4 4 4 3 4 6% 43%	2183
October	1st to 10th	Night	16% 7% 3 8% 4 5% 4 3 5% 7% 38%	2280
	11th to 20th	Night	21% 10% 3 8% 5% 4 4 4 5% 6% 31%	2280
	21st to end	Night	22% 12% 3 7% 5% 5% 4 3 5% 6% 27%	2522
November	1st to 10th	Night	19% 10% 3 7% 4 3 4 3 5% 6% 36%	2523
	11th to 20th	Night	17% 12% 4 7% 5% 5% 5% 4 5% 7% 29%	2660
	21st to end	Night	21% 11% 4 8% 5% 6% 5% 4 6% 7% 23%	2660
December	1st to 10th	Night	20% 15% 5% 11% 6% 4 5% 4 6% 5% 18%	2660
	11th to 20th	Night	17% 17% 5% 11% 5% 5% 4 3 5% 5% 23%	3288
	21st to end	Night	29% 18% 5% 11% 5% 4 4 3 3 4 14%	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	57% 9% 14% 12% 7% 1	2518
	11th to 20th	Day	67% 8% 10% 8% 6% 1	2561
	21st to end	Day	70% 6% 8% 10% 5% 1	3124
February	1st to 10th	Day	63% 7% 11% 15% 4 1	1710
	11th to 20th	Day	60% 5% 10% 14% 10% 1	1672
	21st to end	Day	61% 6% 9% 13% 9% 1	1479
March	1st to 10th	Day	54% 7% 13% 15% 10% 1	3364
	11th to 20th	Day	52% 9% 15% 15% 8% 1	3480
	21st to end	Day	39% 7% 11% 24% 17% 3	3864
April	1st to 10th	Day	54% 5% 9% 20% 10% 2	2280
	11th to 20th	Day	49% 5% 10% 20% 15% 1	2266
	21st to end	Day	52% 6% 9% 18% 12% 3	2470
May	1st to 10th	Day	46% 8% 11% 21% 12% 2	4275
	11th to 20th	Day	46% 10% 13% 19% 11% 1	4402
	21st to end	Day	37% 9% 14% 22% 16% 3	4837
June	1st to 10th	Day	47% 9% 13% 17% 14% 1	2660
	11th to 20th	Day	41% 8% 13% 23% 13% 1	2660
	21st to end	Day	45% 8% 14% 20% 12% 1	2660
July	1st to 10th	Day	39% 7% 16% 24% 14% 1	4370
	11th to 20th	Day	34% 7% 16% 33% 9%	4365
	21st to end	Day	35% 9% 13% 30% 12%	4580
August	1st to 10th	Day	45% 7% 14% 22% 11% 1	4091
	11th to 20th	Day	43% 8% 15% 26% 8%	4083
	21st to end	Day	37% 7% 13% 32% 10% 1	4282
September	1st to 10th	Day	39% 8% 13% 27% 11% 1	2280
	11th to 20th	Day	34% 7% 15% 29% 14% 1	2256
	21st to end	Day	44% 7% 14% 25% 10%	1996
October	1st to 10th	Day	48% 8% 13% 19% 11% 1	1900
	11th to 20th	Day	54% 8% 15% 16% 6% 1	1900
	21st to end	Day	59% 7% 12% 14% 7%	2076
November	1st to 10th	Day	48% 8% 16% 19% 9% 1	1586
	11th to 20th	Day	53% 9% 15% 14% 8% 1	1520
	21st to end	Day	62% 9% 13% 11% 5%	1520
December	1st to 10th	Day	67% 8% 11% 10% 4	1520
	11th to 20th	Day	61% 9% 11% 11% 9%	1906
	21st to end	Day	69% 6% 9% 12% 4	2772
January	1st to 10th	Night	63% 10% 11% 11% 4	4429
	11th to 20th	Night	63% 9% 13% 10% 4 1	4395
	21st to end	Night	64% 8% 11% 11% 6%	4532
February	1st to 10th	Night	60% 7% 12% 16% 5% 1	2470
	11th to 20th	Night	57% 6% 11% 18% 8%	2405
	21st to end	Night	53% 7% 12% 19% 8% 1	1975
March	1st to 10th	Night	53% 7% 10% 20% 10% 1	3486
	11th to 20th	Night	51% 10% 15% 15% 8% 1	3480
	21st to end	Night	38% 7% 11% 25% 16% 2	3768
April	1st to 10th	Night	51% 7% 8% 20% 13% 2	1900
	11th to 20th	Night	46% 7% 10% 20% 15% 2	1875
	21st to end	Night	48% 8% 10% 16% 16% 2	1714
May	1st to 10th	Night	46% 8% 13% 16% 15% 2	2685
	11th to 20th	Night	43% 11% 13% 21% 10% 2	2496
	21st to end	Night	34% 9% 14% 23% 19% 2	2739
June	1st to 10th	Night	42% 8% 13% 21% 15% 2	1520
	11th to 20th	Night	36% 9% 12% 22% 19% 2	1520
	21st to end	Night	43% 7% 14% 21% 14% 2	1520
July	1st to 10th	Night	35% 7% 16% 24% 17% 1	2480
	11th to 20th	Night	34% 6% 13% 33% 14%	2472
	21st to end	Night	32% 6% 15% 33% 13% 1	2728
August	1st to 10th	Night	36% 6% 15% 26% 16% 1	2814
	11th to 20th	Night	36% 7% 18% 27% 11% 1	2812
	21st to end	Night	33% 7% 12% 34% 12% 1	3341
September	1st to 10th	Night	36% 9% 15% 26% 13% 1	1900
	11th to 20th	Night	30% 7% 14% 32% 16% 1	1920
	21st to end	Night	42% 7% 12% 27% 11% 1	2183
October	1st to 10th	Night	43% 9% 13% 20% 14% 1	2280
	11th to 20th	Night	52% 8% 13% 20% 7%	2280
	21st to end	Night	57% 7% 11% 14% 10%	2522
November	1st to 10th	Night	48% 7% 14% 20% 10% 1	2523
	11th to 20th	Night	53% 8% 14% 16% 8% 2	2660
	21st to end	Night	57% 11% 14% 14% 4	2660
December	1st to 10th	Night	64% 9% 11% 12% 4	2660
	11th to 20th	Night	62% 7% 12% 14% 6%	3288
	21st to end	Night	72% 7% 8% 9% 3	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	23% 24% 33% 16% 4 1	180
	11th to 20th	Day	30% 21% 33% 13% 2 1	193
	21st to end	Day	26% 21% 34% 13% 5%	297
February	1st to 10th	Day	33% 22% 33% 10% 3	270
	11th to 20th	Day	29% 25% 39% 6% 1	270
	21st to end	Day	37% 20% 33% 10%	291
March	1st to 10th	Day	24% 22% 35% 15% 3	460
	11th to 20th	Day	27% 21% 33% 16% 2 1	460
	21st to end	Day	32% 19% 30% 13% 6% 1	506
April	1st to 10th	Day	27% 21% 34% 11% 7%	460
	11th to 20th	Day	34% 20% 21% 14% 7% 4	452
	21st to end	Day	30% 18% 32% 12% 7% 1	460
May	1st to 10th	Day	24% 17% 31% 17% 5% 5%	463
	11th to 20th	Day	21% 13% 36% 18% 10% 3	487
	21st to end	Day	17% 14% 34% 20% 11% 4	529
June	1st to 10th	Day	19% 14% 37% 22% 7% 1	490
	11th to 20th	Day	17% 12% 32% 23% 12% 4	490
	21st to end	Day	22% 12% 32% 22% 10% 3	490
July	1st to 10th	Day	11% 8% 34% 31% 13% 4	485
	11th to 20th	Day	13% 11% 30% 25% 15% 6%	484
	21st to end	Day	11% 10% 35% 29% 12% 4	532
August	1st to 10th	Day	14% 9% 30% 27% 14% 6%	486
	11th to 20th	Day	12% 8% 28% 29% 16% 7%	479
	21st to end	Day	12% 10% 32% 27% 12% 7%	539
September	1st to 10th	Day	16% 11% 29% 23% 13% 8%	490
	11th to 20th	Day	11% 10% 28% 21% 18% 13%	490
	21st to end	Day	18% 15% 26% 26% 11% 5%	490
October	1st to 10th	Day	23% 18% 26% 16% 13% 5%	490
	11th to 20th	Day	24% 21% 32% 15% 6% 2	490
	21st to end	Day	32% 21% 26% 17% 4	532
November	1st to 10th	Day	26% 18% 28% 20% 7%	274
	11th to 20th	Day	29% 23% 32% 12% 3 2	180
	21st to end	Day	29% 19% 37% 13% 2	180
December	1st to 10th	Day	28% 25% 29% 15% 3	180
	11th to 20th	Day	34% 23% 24% 16% 1 1	180
	21st to end	Day	35% 20% 35% 9% 2	198
January	1st to 10th	Night	27% 22% 29% 16% 6% 1	760
	11th to 20th	Night	28% 17% 31% 19% 5%	760
	21st to end	Night	20% 18% 33% 24% 5% 1	836
February	1st to 10th	Night	22% 22% 36% 18% 2	760
	11th to 20th	Night	22% 18% 39% 18% 3	743
	21st to end	Night	25% 21% 33% 18% 3	628
March	1st to 10th	Night	22% 19% 35% 20% 4	760
	11th to 20th	Night	23% 20% 34% 19% 4 1	760
	21st to end	Night	21% 15% 34% 21% 8%	836
April	1st to 10th	Night	25% 16% 34% 20% 5%	760
	11th to 20th	Night	24% 16% 32% 21% 8% 1	751
	21st to end	Night	23% 11% 30% 26% 9% 1	574
May	1st to 10th	Night	22% 7% 31% 27% 11% 2	480
	11th to 20th	Night	14% 10% 36% 31% 9%	374
	21st to end	Night	12% 9% 31% 35% 12% 1	411
June	1st to 10th	Night	16% 8% 35% 30% 12%	380
	11th to 20th	Night	13% 9% 29% 36% 12% 1	380
	21st to end	Night	13% 9% 29% 35% 13%	380
July	1st to 10th	Night	7% 6% 26% 44% 16%	370
	11th to 20th	Night	9% 4 32% 33% 21% 1	368
	21st to end	Night	10% 4 30% 40% 15% 2	459
August	1st to 10th	Night	12% 4 22% 37% 24% 2	567
	11th to 20th	Night	11% 5% 20% 36% 25% 2	564
	21st to end	Night	12% 6% 29% 32% 20% 2	753
September	1st to 10th	Night	12% 8% 31% 29% 18% 3	760
	11th to 20th	Night	12% 6% 23% 30% 25% 4	760
	21st to end	Night	19% 10% 22% 28% 18% 3	760
October	1st to 10th	Night	19% 12% 29% 23% 15% 2	760
	11th to 20th	Night	26% 15% 30% 20% 8% 1	760
	21st to end	Night	29% 16% 29% 21% 4	836
November	1st to 10th	Night	26% 12% 28% 25% 8% 1	748
	11th to 20th	Night	24% 17% 34% 18% 6% 1	760
	21st to end	Night	29% 14% 30% 21% 5%	760
December	1st to 10th	Night	29% 21% 33% 14% 4	760
	11th to 20th	Night	24% 21% 35% 16% 4	760
	21st to end	Night	34% 16% 31% 15% 2	836

Page generated at 2024-10-30 13:19:25. Version ac07

Copyright © 2024 Attilla Danko.