Normal, Means, and Extremes
The following tables provide the "normal" weather conditions on Mount Washington for each month, averaged over the period of 1991-2020. Also included are the extreme (record) conditions recorded during the station's history, from 1933 to the present.
Note: Values on this page are subject to change without notice.
Temperatures (°F)
| |
Normal Monthly
Average |
Normal Daily
Maximum Average |
Normal Daily
Minimum Average |
Record High
(Year) |
Record Low
(Year) |
| January |
5.8 |
14.9 |
-3.2 |
48 (2013) |
-47 (1934) |
| February |
5.9 |
14.8 |
-3.0 |
48 (2018) |
-47 (2023) |
| March |
12.9 |
20.8 |
4.9 |
54 (1998, 2012) |
-38 (1950) |
| April |
23.7 |
30.7 |
16.7 |
60 (1976) |
-20 (1995) |
| May |
36.3 |
42.5 |
30.2 |
66 (1977,2020) |
-2 (1966) |
| June |
45.5 |
51.4 |
39.6 |
72 (2003) |
8 (1945) |
| July |
49.9 |
55.3 |
44.5 |
71 (1953,2018) |
24 (2001) |
| August |
48.7 |
54.2 |
43.2 |
72 (1975) |
20 (1986) |
| September |
43.1 |
49.1 |
37.1 |
69 (1999) |
9 (1992) |
| October |
31.3 |
37.7 |
24.9 |
62 (2005) |
-5 (1939) |
| November |
20.8 |
28.4 |
13.1 |
52 (1982,2019,2022) |
-26 (2018) |
| December |
11.8 |
20.1 |
3.5 |
47 (2001) |
-46 (1933) |
| Annual |
28.0 |
35.0 |
21.0 |
72 (Aug. 1975) |
-47 (Jan. 1934, Feb 2023) |
Precipitation (Water Equivalent, Inches)
| |
Normal Monthly
Average |
Record Maximum
Monthly Total (Year) |
Record Minimum
Monthly Total (Year) |
Record Maximum
in 24 Hours (Year) |
| January |
5.74 |
18.23 (1958) |
1.29 (1981) |
4.85 (1986) |
| February |
5.45 |
25.56 (1969) |
0.98 (1980) |
10.30 (1970) |
| March |
6.72 |
15.98 (1977) |
2.15 (1946) |
6.45 (1999) |
| April |
7.31 |
15.21 (1988) |
2.19 (1959) |
8.30 (1984) |
| May |
7.68 |
19.00 (1997) |
1.78 (1951) |
4.60 (1967) |
| June |
8.59 |
19.96 (1998) |
2.43 (1979) |
6.50 (1973) |
| July |
8.93 |
17.08 (2023) |
2.69 (1995) |
7.37 (1969) |
| August |
7.72 |
20.69 (1991) |
2.46 (1996) |
6.66 (2011) |
| September |
7.66 |
15.47 (1994) |
2.74 (1948) |
5.38 (1985) |
| October |
9.99 |
28.70 (2005) |
0.75 (1947) |
11.07 (1996) |
| November |
8.09 |
19.56 (1983) |
2.31 (1939) |
6.07 (1968) |
| December |
7.35 |
17.95 (1973) |
1.49 (1955) |
8.64 (1969) |
| Annual |
91.23 |
|
| |
130.14 (1969) |
71.34 (1979) |
Snow, Ice Pellets, Hail (Inches)
| |
Normal Monthly
Average |
Record Maximum
Monthly Total (Year) |
Record Maximum
in 24 Hours (Year) |
| January |
41.4 |
94.6 (1978) |
24.0 (1978) |
| February |
43.3 |
172.8 (1969) |
49.3 (1969) |
| March |
46.2 |
98.0 (1970) |
27.4 (1969) |
| April |
33.1 |
110.9 (1988) |
27.2 (1988) |
| May |
12.9 |
95.8 (1997) |
22.2 (1967) |
| June |
1.3 |
8.1 (1959) |
5.1 (1988) |
| July |
0.0 |
1.1 (1957) |
1.1 (1957) |
| August |
0.1 |
2.5 (1965) |
2.5 (1965) |
| September |
1.2 |
7.8 (1949) |
7.7 (1986) |
| October |
19.0 |
78.9 (2005) |
25.7 (2005) |
| November |
35.6 |
86.6 (1968) |
25.0 (1968) |
| December |
47.7 |
103.7 (1968) |
37.5 (1968) |
| Annual |
281.8 |
|
| |
566.4 (1968-69) |
Wind (MPH)
| |
Normal Monthly
Average Speed |
Normal Monthly
Average Direction |
Record Peak Gust
Direction (Year) |
| January |
45.6 |
W |
172 - NW (1985) |
| February |
44.6 |
W |
171 - W (2019) |
| March |
39.8 |
W |
180 - W(1942) |
| April |
35.6 |
W |
231 - SE (1934) |
| May |
29.6 |
W |
164 - W (1945) |
| June |
26.8 |
W |
136 - NW (1941) |
| July |
25.5 |
W |
154 - W (1996) |
| August |
24.5 |
W |
147 - SE (2020) |
| September |
27.6 |
W |
174 - SE (1979) |
| October |
35.5 |
W |
161 - W (1943) |
| November |
39.4 |
W |
163 - NW (1983) |
| December |
44.0 |
W |
178 - NW(1980) |
| Annual |
34.9 |
W |
231 - SE (1934) |