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Weather
Extremes
Climatology
Current Weather Forecasts Cams Wind Chill Chart Weatheradio
  Here are some tables and graphs of Mount Washington's winds, temperatures and precipitation.  Use them to get a feel for what the weather may be like during any particular month.  The data is based on historical records collected by the Mount Washington Observatory and U.S. Weather Bureau.  If you spot any corrections or records that have been broken, please e-mail me!

Winds (MPH)
 
MonthPeak
Gust
Average
Speed
Average
Wind Chill (°F)
JAN173 (1985)46.3-49
FEB166 (1972)44.5-47
MAR180 (1942)41.6-34
APR231 (1934)36.1-17
MAY164 (1945)29.76
JUN136 (1949)27.720
JUL154 (1996)25.327
AUG142 (1954)25.125
SEP174 (1979)29.113
OCT161 (1943)33.8-4
NOV163 (1983)39.7-21
DEC178 (1980)44.8-41

Peak Wind Gust (MPH)
[GRAPH]

Average Wind Speed (MPH)
[GRAPH]

Average Wind Chill (°F)
[GRAPH]


Probability in a 24-hour Period of Winds Over...
 
MonthHurricane
Force
100
MPH
JAN74%35%
FEB74%35%
MAR58%23%
APR43%13%
MAY32%10%
JUN23%7%
JUL16%3%
AUG19%3%
SEP33%7%
OCT48%13%
NOV63%27%
DEC71%32%

Probability in a 24-hour Period of Winds Over...
[GRAPH]


Temperatures (°F)
 
MonthRecord
High
Average
High
Mean
Temp.
Average
Low
Record
Low
JAN4712.33.9-4.6-47
FEB4313.15.0-3.2-46
MAR5420.112.85.4-38
APR6028.722.416.1-20
MAY6641.034.828.5-2
JUN7249.443.737.98
JUL7153.648.343.025
AUG7251.846.841.620
SEP6945.940.334.69
OCT5936.430.324.2-5
NOV5227.320.613.9-20
DEC4517.18.90.6-46

Temperatures (°F)
[GRAPH]


Probability in a 24-hour Period of Temperatures...
 
MonthAbove
Freezing
Below
Freezing
Below
Zero
JAN6%100%58%
FEB6%99%59%
MAR16%99%35%
APR39%94%6%
MAY80%64%0%
JUN97%22%0%
JUL100%5%0%
AUG99%10%0%
SEP93%40%0%
OCT66%75%1%
NOV33%94%13%
DEC13%99%45%

Probability in a 24-hour Period of Temperatures...
[GRAPH]


Precipitation, Liquid Equivalent (Inches)
 
MonthMonthly
Average
Monthly
Maximum
24-hour
Maximum
JAN7.9418.23 (1958)4.85 (1986)
FEB8.5625.56 (1969)10.38 (1970)
MAR8.9715.98 (1977)6.45 (1999)
APR8.1715.21 (1988)8.30 (1984)
MAY7.5119.00 (1997)4.60 (1967)
JUN7.8216.00 (1973)6.50 (1973)
JUL7.0816.585 (1996)7.37 (1969)
AUG8.2420.69 (1991)6.63 (1991)
SEP7.3815.47 (1994)5.38 (1985)
OCT7.1921.25 (1995)11.07 (1996)
NOV10.3819.56 (1983)6.07 (1968)
DEC9.7217.95 (1973)8.64 (1969)

Precipitation, Liquid Equivalent (Inches)
[GRAPH]


Snowfall (Inches)
 
MonthMonthly
Average
Monthly
Maximum
24-hour
Maximum
JAN40.194.6 (1978)24.0 (1978)
FEB40.7172.8 (1969)49.3 (1969)
MAR42.598.0 (1970)27.4 (1969)
APR30.9110.9 (1988)27.2 (1988)
MAY10.395.8 (1997)22.2 (1967)
JUN1.28.1 (1959)5.1 (1988)
JULtrace1.1 (1957)1.1 (1957)
AUG0.12.5 (1965)2.5 (1965)
SEP1.97.8 (1949)7.7 (1986)
OCT11.839.8 (2000)17.0 (1969)
NOV31.686.6 (1968)25.0 (1968)
DEC42.6103.7 (1968)37.5 (1968)

Snowfall (Inches)
[GRAPH]

 

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