North
Idaho
Weather
Records & Averages
Counties in Northern Idaho*
*
Names in parentheses are the locations of weather data
collection stations. Click on one of the following links
to obtain the historical records and averages for that
site. Remember that mountains, valleys, elevation, and
other topographical features strongly affect climate
and weather. The weather at your site can differ from
that at the official data collection site.
The
weather data below were provided by the University of Idaho,
National Weather Service, and Western Regional Climate Center.
For more detailed information or for data on cities not listed
below, visit the Western
regional Climate Center.
Averages
based on data collected at St. Maries,
Idaho: elevation 2,220 feet.
| Month |
Temperature
(oF) |
Precipitation
(inches) |
average daily maximum
|
average daily minimum
|
2 years in 10 will have: |
average
|
2 years in 10 will have: |
average number of days with 0.1 inch or more |
average snowfall |
| maximum temperature greater than: |
minimum temperature lower than |
less than
|
greater than
|
| Jan |
35.2 |
21.9 |
53 |
-13 |
4.85 |
2.79 |
6.53 |
12 |
21.5 |
| Feb |
42.6 |
25.5 |
60 |
0 |
2.96 |
1.65 |
4.02 |
8 |
9.6 |
| Mar |
48.4 |
27.2 |
70 |
7 |
2.78 |
1.81 |
3.65 |
9 |
6.6 |
| Apr |
58.4 |
32.6 |
80 |
21 |
2.18 |
1.24 |
2.95 |
6 |
0.5 |
| May |
69.1 |
40.0 |
90 |
27 |
2.02 |
1.15 |
2.71 |
6 |
0.0 |
| Jun |
76.3 |
46.1 |
93 |
35 |
2.19 |
1.31 |
2.96 |
5 |
0.0 |
| Jul |
86.4 |
48.6 |
101 |
37 |
0.60 |
0.06 |
1.00 |
2 |
0.0 |
| Aug |
85.3 |
47.1 |
102 |
35 |
1.14 |
0.17 |
1.87 |
3 |
0.0 |
| Sep |
75.7 |
41.0 |
95 |
27 |
1.43 |
0.67 |
2.05 |
4 |
0.0 |
| Oct |
61.4 |
34.9 |
83 |
21 |
2.37 |
1.02 |
3.47 |
7 |
0.5 |
| Nov |
44.8 |
29.1 |
63 |
7 |
3.74 |
1.91 |
5.23 |
10 |
5.7 |
| Dec |
36.8 |
24.9 |
53 |
-5 |
4.23 |
2.79 |
5.53 |
12 |
15.1 |
| |
| Year |
60.0 |
34.9 |
103 |
-18 |
30.49 |
26.63 |
34.20 |
84 |
59.5 |
Record
Extremes
Maximum temperature: 109 oF: August 4, 1961
Minimum temperature: -29 oF:
December 30, 1968
Max one-day precipitation (rain & melted snow): 2.33
inches: October 27, 1994
Maximum snowfall (January-December): 174.3 inches: 1996
Frost
dates
| Probability |
Minimum Temperature
|
| 24 oF or lower |
28 oF or lower |
32 oF or lower |
|
Last freezing temperature in spring
|
| 1 year in 10 later than |
April 24 |
May 14 |
June 3 |
| 2 years in 10 later than |
April 17 |
May 8 |
May 28 |
| 5 years in 10 later than |
April 4 |
April 27 |
May 17 |
|
First freezing temperature in fall
|
| 1 year in 10 earlier than |
October 4 |
September 14 |
September 3 |
| 2 years in 10 earlier than |
October 13 |
September 21 |
September 9 |
| 5 years in 10 earlier than |
October 28 |
October 4 |
September 18 |
Growing
Seasons
| Probability |
Daily Minimum Temperature During the Growing Season
|
| higher than 24
oF |
higher than 28
oF |
higher than 32oF |
| 9 years in 10 |
171 days |
131 days |
102 days |
| 8 years in 10 |
183 |
141 |
109 |
| 5 years in 10 |
206 |
159 |
123 |
| 2 years in 10 |
229 |
178 |
138 |
| 1 year in 10 |
242 |
188 |
145 |
Growing
Degree Days
|
Growing
Degree Days for Selected Base Temperatures (oF)
1948-2005
Averages |
| Base |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| 40 |
4 |
14 |
63 |
201 |
436 |
624 |
840 |
820 |
547 |
234 |
35 |
4 |
3822 |
| 45 |
0 |
2 |
17 |
97 |
289 |
475 |
685 |
665 |
399 |
118 |
7 |
0 |
2755 |
| 50 |
0 |
0 |
3 |
38 |
163 |
327 |
530 |
510 |
261 |
46 |
1 |
0 |
1879 |
| 55 |
0 |
0 |
0 |
11 |
74 |
195 |
376 |
357 |
144 |
12 |
0 |
0 |
1169 |
| 60 |
0 |
0 |
0 |
3 |
26 |
93 |
232 |
215 |
61 |
1 |
0 |
0 |
630 |
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Averages
based on data collected at Sandpoint,
Idaho: elevation 2,120 feet.
| Month |
Temperature
(oF) |
Precipitation
(inches) |
average daily maximum
|
average daily minimum
|
2 years in 10 will have: |
average
|
2 years in 10 will have: |
average number of days with 0.1 inch or more |
average snowfall |
| maximum temperature greater than: |
minimum temperature lower than |
less than
|
greater than
|
| Jan |
32.0 |
20.9 |
48 |
-13 |
4.8 |
2.74 |
6.61 |
11 |
30.4 |
| Feb |
38.5 |
24.4 |
52 |
-6 |
3.17 |
1.76 |
4.40 |
8 |
14.8 |
| Mar |
44.7 |
26.9 |
61 |
4 |
2.55 |
1.39 |
3.57 |
8 |
8.4 |
| Apr |
55.8 |
33.4 |
75 |
20 |
2.08 |
1.06 |
2.96 |
6 |
0.9 |
| May |
65.8 |
39.9 |
83 |
26 |
2.27 |
1.26 |
3.15 |
7 |
0.0 |
| Jun |
72.9 |
46.2 |
90 |
33 |
2.19 |
1.20 |
3.04 |
7 |
0.0 |
| Jul |
81.2 |
48.5 |
94 |
36 |
0.95 |
0.23 |
1.53 |
3 |
0.0 |
| Aug |
79.9 |
47.3 |
96 |
35 |
1.56 |
0.33 |
2.53 |
4 |
0.0 |
| Sep |
69.7 |
41.4 |
87 |
27 |
1.68 |
0.54 |
2.61 |
5 |
0.0 |
| Oct |
56.0 |
34.2 |
74 |
19 |
2.68 |
0.89 |
4.16 |
7 |
1.1 |
| Nov |
41.0 |
28.2 |
57 |
9 |
4.36 |
2.07 |
6.32 |
10 |
8.8 |
| Dec |
33.8 |
23.7 |
49 |
-7 |
4.84 |
3.12 |
6.39 |
11 |
23.7 |
| |
| Year |
55.9 |
34.6 |
45.3 |
- - - |
33.13 |
28.96 |
37.12 |
87 |
88.1 |
Record
Extremes
Maximum temperature: 104 oF: July 20, 1923
Minimum temperature: -37 o F: December 30, 1968
Max one-day precipitation (rain & melted snow): 2.95
inches: May 27, 1998
Maximum snowfall (January-December): 172.1 inches: 1964
Frost dates
| Probability |
Minimum Temperature |
| 24 oF or lower |
28 oF or lower |
32 oF or lower |
|
Last freezing temperature in spring
|
| 1 year in 10 later than |
April 27 |
May 21 |
June 2 |
| 2 years in 10 later than |
April 21 |
May 15 |
May 28 |
| 5 years in 10 later than |
April 9 |
May 2 |
May 18 |
|
First freezing temperature in fall
|
| 1 year in 10 earlier than |
September 26 |
September 18 |
September 1 |
| 2 years in 10 earlier than |
October 6 |
September 24 |
September 6 |
| 5 years in 10 earlier than |
October 24 |
October 7 |
September 16 |
Growing
Seasons
| Probability |
Daily Minimum Temperature During the Growing Season
|
| higher than 24 oF |
higher than 28 oF |
higher than 32 oF |
| 9 years in 10 |
159 days |
132 days |
99 days |
| 8 years in 10 |
172 |
140 |
106 |
| 5 years in 10 |
197 |
157 |
120 |
| 2 years in 10 |
221 |
173 |
134 |
| 1 year in 10 |
234 |
182 |
141 |
Growing
Degree Days
|
Growing
Degree Days for Selected Base Temperatures (oF)
1910-2005
Averages |
| Base |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| 40 |
1 |
4 |
34 |
181 |
411 |
586 |
782 |
744 |
473 |
190 |
22 |
4 |
3431 |
| 45 |
0 |
0 |
6 |
82 |
263 |
437 |
627 |
589 |
325 |
84 |
4 |
0 |
2416 |
| 50 |
0 |
0 |
0 |
27 |
140 |
290 |
472 |
434 |
192 |
25 |
0 |
0 |
1582 |
| 55 |
0 |
0 |
0 |
7 |
58 |
161 |
319 |
283 |
89 |
4 |
0 |
0 |
920 |
| 60 |
0 |
0 |
0 |
1 |
17 |
68 |
178 |
148 |
28 |
0 |
0 |
0 |
440 |
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Averages
based on data collected at Bonners Ferry,
Idaho: elevation 1,860 feet.
| Month |
Temperature
(oF) |
Precipitation
(inches) |
average daily maximum
|
average daily minimum
|
2 years in 10 will have at least 4 days with: |
average
|
2 years in 10 will have: |
number of days with snow cover |
average snow depth on days with snow cover |
| maximum temperature greater than: |
minimum temperature lower than |
less than
|
greater than
|
| Jan |
31.4 |
18.6 |
44 |
-5 |
3.4 |
1.10 |
6.11 |
25 |
12 |
| Feb |
39.2 |
23.0 |
48 |
7 |
2.13 |
0.73 |
3.35 |
19 |
13 |
| Mar |
46.9 |
26.4 |
60 |
12 |
1.72 |
0.79 |
2.72 |
9 |
9 |
| Apr |
59.1 |
33.7 |
73 |
25 |
1.326 |
0.52 |
1.94 |
0 |
0 |
| May |
68.8 |
40.5 |
83 |
31 |
1.67 |
0.81 |
3.07 |
0 |
0 |
| Jun |
74.7 |
46.9 |
88 |
38 |
1.85 |
0.87 |
3.18 |
0 |
0 |
| Jul |
84.1 |
49.8 |
95 |
41 |
0.80 |
0.10 |
1.97 |
0 |
0 |
| Aug |
82.3 |
48.3 |
94 |
40 |
1.00 |
0.28 |
2.00 |
0 |
0 |
| Sep |
72.4 |
41.8 |
87 |
32 |
1.50 |
0.45 |
3.10 |
0 |
0 |
| Oct |
56.8 |
34.6 |
70 |
24 |
2.39 |
0.44 |
4.53 |
1 |
2 |
| Nov |
41.3 |
27.5 |
48 |
12 |
3.43 |
0.95 |
5.81 |
6 |
6 |
| Dec |
34.3 |
23.1 |
44 |
5 |
3.39 |
1.70 |
4.84 |
18 |
7 |
| |
| Year |
57.6 |
34.5 |
97 |
-9 |
24.54 |
20.20 |
29.47 |
78 |
10 |
Record
Extremes
Maximum
temperature: 104 oF: July 16, 1941
Minimum temperature: -33 oF: December 30, 1968
Max one-day precipitation (rain & melted snow): 2.80
inches: Jan 27, 1999
Maximum snowfall (January-December): 148.8 inches: 1996
Frost
dates
| Probability |
Minimum Temperature |
| 24
oF or lower |
28
oF or lower |
32
oF or lower |
|
Last freezing temperature in spring
|
| 1
year in 10 later than |
April 24 |
May
16 |
May
30 |
| 2
years in 10 later than |
April 17 |
May
11 |
May
25 |
| 5
years in 10 later than |
April 5 |
April 30 |
May
14 |
|
First freezing temperature in fall
|
| 1
year in 10 earlier than |
October 3 |
September 18 |
September 6 |
| 2
years in 10 earlier than |
October 10 |
September 25 |
September 11 |
| 5
years in 10 earlier than |
October 24 |
October 9 |
September 20 |
Growing
Degree Days
|
Growing
degree days for selected temperatures (oF)
1907-2005
averages |
| Base |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| 40 |
3 |
5 |
47 |
214 |
457 |
629 |
831 |
798 |
512 |
194 |
25 |
3 |
3719 |
| 45 |
0 |
0 |
10 |
100 |
305 |
| | 
