STATION: MONTAGUE-SISKIYOU COUNTY AIRPORT (KSIY), CA
CLIMATOLOGICAL SUMMARY. Period of Record: Jan 2001 to Dec 2008
Summaries based on unedited daily ASOS data. Errors may be present.
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TEMPERATURE (F) | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
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Avg Max Temp | 45.0 50.5 57.4 61.4 73.2 82.0 93.0 90.3 82.8 68.4 52.2 44.9 | 66.8
Avg Min Temp | 25.9 26.3 29.4 32.9 40.9 46.5 55.2 51.7 43.7 35.1 29.7 27.4 | 37.1
Avg Temperature | 35.5 38.4 43.4 47.2 57.1 64.2 74.1 71.0 63.2 51.7 41.0 36.1 | 51.9
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Extremes: | |
Extreme Max Temp| 62 66 77 84 98 104 109 105 98 91 72 60 | 109
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Date of Ext-Day | 31 22 31 26 16 25 11 14 02 01 07 24 |
-Year| 2003 2002 2002 2004 2008 2006 2002 2008 2003 2001 2006 2005 |
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Extreme Min Temp| 3 9 11 15 19 33 45 37 28 12 13 -2 | -2
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Date of Ext-Day | 28 05 31 05 01 04 08 31 29 31 01 16 |
-Year| 2008 2008 2008 2001 2008 2005 2001 2008 2007 2002 2002 2008 |
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Heating Degree Days | 916 751 669 535 266 93 0 9 107 412 721 895 | 5375
Cooling Degree Days | 0 0 0 0 20 71 282 195 55 1 0 0 | 624
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.0 2.8 6.5 23.1 18.7 9.2 0.3 0.0 0.0 | 60.5
Max Temp >= 75 | 0.0 0.0 0.9 4.0 14.2 24.0 30.9 30.1 23.8 8.7 0.0 0.0 | 136.6
Max Temp <= 32 | 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 | 1.5
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Min Temp <= 32 | 25.5 22.5 21.0 13.0 3.4 0.0 0.0 0.0 0.9 12.0 20.2 22.9 | 141.3
Min Temp <= 20 | 7.3 6.3 2.9 0.9 0.1 0.0 0.0 0.0 0.0 0.4 2.8 7.3 | 28.0
Min Temp <= 0 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 | 0.3
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Avg Dew Point Temp | 28.8 28.5 31.6 34.1 39.6 41.3 46.3 43.8 37.3 33.6 32.6 29.4 | 35.6
Avg Wet Bulb Temp | 32.4 33.9 38.2 41.3 48.4 52.3 58.2 56.2 50.0 42.5 36.9 32.7 | 43.6
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Avg Sea Level Pres | 30.23 30.16 30.13 30.05 30.02 30.00 29.97 29.97 30.01 30.11 30.21 30.19 | 30.09
(Inches of Mercury) | |
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WEATHER | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
See disclaimer below| |
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Avg Number of Days: | |
Thunderstorms | 0.4 0.1 0.6 0.4 2.1 2.0 2.5 1.4 1.0 0.1 0.1 0.1 | 11.0
Heavy Fog | 6.0 1.8 1.8 0.4 1.1 0.0 0.0 0.0 0.1 0.4 5.3 6.2 | 23.0
Fog | 13.0 7.5 7.2 6.7 3.4 0.5 0.4 0.4 0.9 2.1 13.1 13.7 | 68.9
Hail | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.0
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PRECIPITATION (In) | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
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Average Monthly | 1.50 1.19 0.90 1.10 1.04 0.17 0.11 0.20 0.22 0.72 2.05 3.22 | 12.41
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Maximum Daily | 1.28 1.43 0.57 1.08 0.64 0.24 0.67 0.53 0.70 1.42 1.51 2.14 | 2.14
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Date of Ext-Day | 04 21 01 30 28 04 10 06 24 19 07 30 |
-Year| 2008 2007 2004 2002 2008 2007 2001 2006 2001 2007 2005 2005 |
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Avg Number of Days: | |
>= 0.01 | 10.9 7.9 9.0 9.8 7.2 2.9 1.1 1.3 1.2 4.4 10.6 12.5 | 78.9
>= 0.10 | 4.3 3.4 2.9 3.4 3.5 0.6 0.1 0.5 0.8 1.9 5.3 6.2 | 32.9
>= 0.25 | 2.1 1.1 0.9 1.1 1.5 0.0 0.1 0.4 0.2 0.9 2.4 4.2 | 15.0
>= 0.50 | 0.5 0.6 0.3 0.4 0.4 0.0 0.1 0.1 0.1 0.3 1.1 1.6 | 5.5
>= 1.00 | 0.1 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.3 0.9 | 1.6
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WIND (MPH) | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
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Daily Avg Wind Speed| 5.1 5.5 6.5 6.7 6.8 7.6 6.5 6.3 5.5 5.1 4.5 6.2 | 6.0
Daily Avg Max 2-Min | 16.2 17.8 19.0 20.1 18.6 20.0 18.5 18.3 17.1 15.7 15.2 19.0 | 18.0
Daily Avg Peak Gust | 19.3 21.0 22.8 24.3 22.9 24.7 22.9 22.3 20.4 18.7 18.4 22.6 | 21.7
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Maximum Daily Avg | 23.6 23.5 25.7 17.8 22.2 20.3 12.2 14.2 15.7 27.2 24.7 30.1 | 30.1
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Maximum 2-Minute Avg| 58 70 58 39 36 39 29 38 38 43 48 53 | 70
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Date of Max 2min-Day| 04 14 13 07 06 16 22 28 16 31 07 14 |
-Year| 2008 2006 2003 2006 2004 2005 2002 2003 2008 2008 2002 2002 |
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Maximum Peak Gust | 86 72 68 55 45 47 40 48 51 52 56 66 | 86
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Date of Max Gust-Day| 14 14 13 07 23 16 29 28 16 31 07 14 |
-Year| 2006 2006 2003 2006 2006 2005 2008 2003 2008 2008 2002 2002 |
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Avg Number of Days: | |
Peak Gust >=30 | 6.5 5.6 7.1 7.0 5.9 5.4 2.0 2.8 3.0 4.3 5.3 9.1 | 64.1
Peak Gust >=40 | 2.3 2.1 2.8 1.8 0.4 0.7 0.1 0.3 0.3 0.8 1.6 5.4 | 18.5
Peak Gust >=50 | 1.0 0.8 1.0 0.1 0.0 0.0 0.0 0.0 0.1 0.3 0.5 1.4 | 5.3
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Max 2-Minute >=30| 3.8 3.0 3.7 2.5 1.3 1.1 0.0 0.4 1.0 1.8 2.6 0.0 | 21.1
Max 2-Minute >=40| 1.1 1.4 0.9 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 0.0 | 4.7
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Observations of WEATHER may me innacurate due to early ASOS inconsistancies. Average days
with Thunderstorms may be low due to early mis-detection.
Heavy Fog = Visibility less than or equal to 1/4 mile.
Fog = Visibility greater than 1/4 mile or less than 7 miles.
Peak Gust = Maximum 5-second average.
Snowfall data not observed at ASOS stations.
Copyright ©2009 Western Regional Climate Center - Desert Research Institute - Reno, Nevada.