STATION: BELGRADE-GALLATIN FIELD AIRPORT (KBZN), MT
CLIMATOLOGICAL SUMMARY. Period of Record: Jul 1996 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 | 31.9 36.3 46.7 55.7 65.3 72.9 87.3 84.8 72.8 58.3 42.8 32.4 | 57.3
Avg Min Temp | 9.6 12.9 20.9 28.2 36.6 43.6 49.3 46.9 38.3 28.8 18.2 9.7 | 28.6
Avg Temperature | 20.7 24.6 33.8 41.9 50.9 58.2 68.3 65.8 55.6 43.5 30.5 21.0 | 42.9
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Extremes: | |
Extreme Max Temp| 60 71 76 83 91 100 107 102 99 87 74 60 | 107
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Date of Ext-Day | 23 12 12 28 29 28 13 25 02 01 12 11 |
-Year| 2007 2003 2007 2007 2003 2007 2002 2008 2007 1997 1999 2004 |
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Extreme Min Temp| -36 -35 -17 -4 14 29 26 33 16 -6 -18 -28 | -36
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Date of Ext-Day | 06 24 02 06 09 05 01 06 24 31 29 21 |
-Year| 2004 2003 2002 1997 2002 1998 2000 1996 2000 2006 2006 1998 |
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Heating Degree Days | 1372 1141 968 692 437 217 31 56 295 666 1034 1363 | 8273
Cooling Degree Days | 0 0 0 0 2 14 133 82 12 0 0 0 | 243
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.0 0.2 1.0 12.1 9.2 1.6 0.0 0.0 0.0 | 24.0
Max Temp >= 75 | 0.0 0.0 0.2 1.4 7.1 13.4 29.2 27.5 14.5 2.9 0.0 0.0 | 96.2
Max Temp <= 32 | 14.3 9.2 3.1 0.8 0.0 0.0 0.0 0.0 0.0 0.8 6.8 15.0 | 50.0
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Min Temp <= 32 | 30.1 27.3 28.2 21.9 9.6 0.6 0.1 0.0 5.8 21.4 27.2 30.2 | 202.4
Min Temp <= 20 | 24.2 20.3 13.0 4.3 0.4 0.0 0.0 0.0 0.3 4.4 15.9 23.3 | 106.0
Min Temp <= 0 | 7.2 3.8 1.4 0.1 0.0 0.0 0.0 0.0 0.0 0.2 3.2 7.4 | 23.2
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Avg Dew Point Temp | 14.4 16.3 21.8 27.8 35.8 44.0 46.4 43.5 36.5 29.0 20.8 14.2 | 29.2
Avg Wet Bulb Temp | 19.4 22.0 29.1 35.8 43.6 50.5 55.6 53.0 45.8 36.7 26.8 19.2 | 36.5
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Avg Sea Level Pres | 30.18 30.15 30.07 30.04 29.99 29.96 29.96 29.98 30.01 30.10 30.16 30.20 | 30.07
(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 | 1.5 2.7 4.3 4.8 10.1 10.7 9.4 8.8 5.2 2.7 2.9 3.1 | 66.1
Heavy Fog | 3.6 2.3 2.6 0.7 0.4 0.3 0.2 0.3 0.2 0.7 2.0 2.4 | 15.6
Fog | 14.4 10.7 10.5 9.2 7.2 7.4 2.4 3.1 3.6 6.0 9.8 12.2 | 96.5
Hail | 0.2 0.0 0.0 0.3 0.1 0.3 0.2 0.2 0.1 0.1 0.0 0.0 | 1.4
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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 | 0.55 0.41 0.73 1.65 2.33 2.74 0.92 0.90 0.89 1.15 0.56 0.49 | 13.32
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Maximum Daily | 0.71 0.29 0.41 0.87 1.01 1.38 1.11 0.73 0.83 1.15 0.51 0.39 | 1.38
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Date of Ext-Day | 14 22 28 17 22 06 10 05 11 16 19 03 |
-Year| 2003 2003 2000 2003 2002 2007 1997 2007 1997 2006 2007 1998 |
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Avg Number of Days: | |
>= 0.01 | 6.9 7.1 8.2 11.4 12.7 13.5 7.6 8.4 7.6 8.3 7.1 6.9 | 105.7
>= 0.10 | 1.8 1.3 2.8 5.5 6.9 7.0 2.7 3.0 2.8 3.5 1.6 1.5 | 40.5
>= 0.25 | 0.4 0.2 0.7 2.2 3.5 4.2 1.1 1.1 1.2 1.5 0.6 0.5 | 17.1
>= 0.50 | 0.1 0.0 0.0 0.8 1.0 1.3 0.2 0.2 0.2 0.3 0.1 0.0 | 4.1
>= 1.00 | 0.0 0.0 0.0 0.0 0.1 0.3 0.1 0.0 0.0 0.1 0.0 0.0 | 0.5
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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| 4.8 5.3 6.3 6.8 6.5 6.0 5.9 6.1 5.8 5.5 4.9 4.9 | 5.7
Daily Avg Max 2-Min | 14.5 15.1 18.3 20.2 20.6 19.6 19.5 20.1 17.8 16.5 15.2 14.7 | 17.7
Daily Avg Peak Gust | 16.9 17.7 21.8 24.5 25.0 23.9 24.5 24.8 21.6 19.6 18.0 17.1 | 21.3
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Maximum Daily Avg | 16.4 16.0 17.2 18.1 14.6 11.6 12.7 12.5 15.4 17.4 16.0 18.4 | 18.4
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Maximum 2-Minute Avg| 41 44 41 40 40 47 48 48 48 44 51 47 | 51
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Date of Max 2min-Day| 15 19 09 28 20 04 07 05 18 31 11 15 |
-Year| 2008 1997 2006 2000 2008 2006 2007 2003 1998 1999 2003 2000 |
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Maximum Peak Gust | 52 86 51 54 51 58 60 62 56 53 59 56 | 86
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Date of Max Gust-Day| 15 09 09 17 20 04 07 05 18 31 11 29 |
-Year| 2008 2002 2006 2005 2008 2006 2007 2003 1998 1999 2003 2008 |
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Avg Number of Days: | |
Peak Gust >=30 | 3.4 3.8 7.4 7.4 9.0 7.1 8.2 9.2 5.2 4.3 4.5 3.1 | 72.8
Peak Gust >=40 | 0.7 0.8 1.8 1.8 1.5 1.0 2.7 2.6 1.4 0.9 0.8 0.9 | 16.8
Peak Gust >=50 | 0.1 0.3 0.1 0.2 0.1 0.3 0.4 0.7 0.2 0.1 0.2 0.2 | 2.8
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Max 2-Minute >=30| 1.1 1.6 3.4 3.4 3.2 2.2 3.6 3.9 1.7 1.3 1.3 0.0 | 26.7
Max 2-Minute >=40| 0.1 0.3 0.1 0.2 0.1 0.3 0.3 0.5 0.2 0.1 0.2 0.0 | 2.4
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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.