Summary of Climatic Data by Month September 2020 - August 31-2021 and Averages for the Years 1980-2020 at the
Northwestern Agricultural Research Center, Kalispell, MT
| Month |
Sep |
Oct |
Nov |
Dec |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Year |
| Year |
2020 |
2020 |
2020 |
2020 |
2021 |
2021 |
2021 |
2021 |
2021 |
2021 |
2021 |
2021 |
|
| Precipitation (inches) |
|
Total |
| Current Year |
0.36 |
2.76 |
1.84 |
0.85 |
0.77 |
1.76 |
0.19 |
1.04 |
3.68 |
2.12 |
0.19 |
1.82 |
17.35 |
| Average (1981- 2020) |
1.58 |
1.41 |
1.59 |
1.48 |
1.39 |
1.23 |
1.28 |
1.74 |
2.33 |
3.33 |
1.47 |
1.04 |
19.87 |
| Difference |
-1.22 |
+1.32 |
+0.25 |
-0.63 |
-0.62 |
+0.53 |
-1.09 |
-0.70 |
+1.35 |
-1.21 |
-1.28 |
+0.78 |
-2.52 |
| Temperature (°F) |
|
Average |
| Current Year |
55.9 |
41.0 |
34.1 |
28.1 |
29.5 |
19.7 |
36.6 |
42.4 |
50.0 |
62.4 |
70.5 |
64.8 |
44.6 |
| Average (1980 - 2020) |
53.9 |
42.3 |
32.7 |
24.4 |
24.5 |
26.8 |
34.8 |
42.8 |
51.5 |
58.0 |
64.5 |
63.7 |
43.3 |
| Difference |
+2.0 |
-1.3 |
+1.4 |
+3.7 |
+5.0 |
-7.1 |
1.8 |
-0.4 |
-1.5 |
+4.4 |
+6.0 |
+1.1 |
+1.3 |
- Last killing frost in spring
- Spring, 2021: May 10 (31 °F)
- Average (1980-2020): May 19
- Last killing frost in fall
- Fall, 2020: September 8 (28 °F)
- Average (1980-2020): September 19
- Frost-free period
- 2021: 124 days
- Average (1980-2020): 123 days
- Temperature Extremes
- Maximum summer temperature: 98 °F (June 30, July 1, and Aug 1, 2021)
- Minimum winter temperaturege -23 °F (February 12, 2021)
- Growing degree days (base 50)
- Jan 1 - October 31, 2021: 2275.50 GDD
- Average (2018-2021): 2027.50 GDD
