Normal, Means & Extremes
The following tables provide the "normal" average weather conditions on Mount Washington for each month, averaged over the period of 1981-2010. 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 |
4.7 |
13.6 |
-4.1 |
48 (2013) |
-47 (1934) |
| February |
6.1 |
14.7 |
-2.4 |
43 (1981, 1999) |
-46 (1943) |
| March |
12.8 |
20.7 |
5.0 |
54 (1998, 2012) |
-38 (1950) |
| April |
23.9 |
30.4 |
17.4 |
60 (1976) |
-20 (1995) |
| May |
35.5 |
41.3 |
29.8 |
66 (1977) |
-2 (1966) |
| June |
45.0 |
50.4 |
39.5 |
72 (2003) |
8 (1945) |
| July |
49.1 |
54.1 |
44.0 |
71 (1953) |
24 (2001) |
| August |
48.1 |
53.3 |
43.0 |
72 (1975) |
20 (1986) |
| September |
41.6 |
47.1 |
36.1 |
69 (1999) |
9 (1992) |
| October |
30.2 |
36.4 |
24.0 |
62 (2005) |
-5 (1939) |
| November |
20.7 |
28.1 |
13.3 |
52 (1982) |
-20 (1958) |
| December |
10.1 |
18.4 |
1.7 |
47 (2001) |
-46 (1933) |
| Annual |
27.3 |
34.1 |
20.7 |
72 (Aug. 1975) |
-47 (Jan. 1934) |
Precipitation (Water Equivalent, Inches)
|
Normal Monthly
Average |
Record Max
Monthly Total (Year) |
Record Min
Monthly Total (Year) |
Record Max
in 24 Hours (Year) |
| January |
6.44 |
18.23 (1958) |
1.29 (1981) |
4.85 (1986) |
| February |
6.77 |
25.56 (1969) |
0.98 (1980) |
10.30 (1970) |
| March |
7.67 |
15.98 (1977) |
2.15 (1946) |
6.45 (1999) |
| April |
7.44 |
15.21 (1988) |
2.19 (1959) |
8.30 (1984) |
| May |
8.18 |
19.00 (1997) |
1.78 (1951) |
4.60 (1967) |
| June |
8.40 |
16.00 (1973) |
2.43 (1979) |
6.50 (1973) |
| July |
8.77 |
16.59 (1996) |
2.69 (1995) |
7.37 (1969) |
| August |
8.32 |
20.69 (1991) |
2.46 (1996) |
6.66 (2011) |
| September |
8.03 |
15.47 (1994) |
2.74 (1948) |
5.38 (1985) |
| October |
9.27 |
28.70 (2005) |
0.75 (1947) |
11.07 (1996) |
| November |
9.85 |
19.56 (1983) |
2.31 (1939) |
6.07 (1968) |
| December |
7.73 |
17.95 (1973) |
1.49 (1955) |
8.64 (1969) |
| Annual |
96.87 |
|
|
130.14 (1969) |
71.34 (1979) |
Snow, Ice Pellets, Hail (Inches)
|
Normal Monthly
Average |
Record Max
Monthly Total (Year) |
Record Max
in 24 Hours (Year) |
| January |
44.0 |
94.6 (1978) |
24.0 (1978) |
| February |
40.1 |
172.8 (1969) |
49.3 (1969) |
| March |
45.1 |
98.0 (1970) |
27.4 (1969) |
| April |
35.6 |
110.9 (1988) |
27.2 (1988) |
| May |
12.2 |
95.8 (1997) |
22.2 (1967) |
| June |
1.0 |
8.1 (1959) |
5.1 (1988) |
| July |
Trace |
1.1 (1957) |
1.1 (1957) |
| August |
0.1 |
2.5 (1965) |
2.5 (1965) |
| September |
2.2 |
7.8 (1949) |
7.7 (1986) |
| October |
17.6 |
78.9 (2005) |
25.7 (2005) |
| November |
37.8 |
86.6 (1968) |
25.0 (1968) |
| December |
45.5 |
103.7 (1968) |
37.5 (1968) |
| Annual |
281.2 |
|
|
566.4 (1968-69) |
Wind (MPH)
|
Normal Monthly
Average Speed |
Normal Monthly
Average Direction |
Record Peak Gust
Direction (Year) |
| January |
46.0 |
W |
172 - NW (1985) |
| February |
44.1 |
W |
166 - E (1972) |
| March |
40.3 |
W |
180 - W(1942) |
| April |
34.7 |
W |
231 - SE (1934) |
| May |
29.1 |
W |
164 - W (1945) |
| June |
27.6 |
W |
136 - NW (1941) |
| July |
25.7 |
W |
154 - W (1996) |
| August |
24.0 |
W |
142 - ENE (1954) |
| September |
28.6 |
W |
174 - SE (1979) |
| October |
34.7 |
W |
161 - W (1943) |
| November |
40.4 |
W |
163 - NW (1983) |
| December |
44.9 |
W |
178 - NW(1980) |
| Annual |
35.0 |
W |
231 - SE (1934) |