Request Data
Mount Washington Observatory has been taking hourly weather observations from our mountaintop station since 1932, and we have digitized much of our dataset. If you are interested in data from 1949 to the present, first check availability, then complete this form. For data prior to 1949, please email for details as that time period is still undergoing quality assurance.
Unless you are a research partner of Mount Washington Observatory there is a cost associated with most data requests. Please submit your request and we will respond to you via email within 2-3 weeks.
MWO HISTORICAL DATA AVAILABILITY
*Indicates data is available to a resolution of 3-hours.
**Indicates data is intermittently available during these time periods. Inquire for more specific availability.
MINUTE HOURLY 6-HOURLY DAILY MONTHLY YEARLY SEASONAL
Air Temperature °F 8/18/2007 – present 1/1/1935 – present 1/1/1935 – present 1/1/1935 – present 1/1934 – present 1934 – present 1934 – present
Liquid Precipitation in
1/8/1940 – present
1/1/1935 – 1/7/1940**
1/8/1940 – present 1/1/1935 – present 1/1935 – present 1935 – present 1935 – present
Average Wind Direction cardinal/ degrees 4/12/2006 – present 1/1/1935 – present 1/1/1935 – present 1/1942 – present
Average Wind Speed mph 2/1/2006 – present 1/1/1935 – present 1/1/1935 – present 1/1935 – present
Peak Wind Speed mph 2/1/2006 – present 1/1/1935 – present 1/1/1935 – present 1/1935 – present
Prevailing Visibility SM 1/1/1941 – present
Sunshine Minutes min 6/1/1940 – present 6/1/1940 – present 6/1940 – present
Present Weather Phenomena N/A 1/1/1935 – present
Sky Cover 8ths or 10ths
3/1/1940 – present
1/1/1935 – 2/28/1940**
1/1/1945 – present 1/1935 – present
Clouds Below Summit N/A 2/4/1959 – present 2/4/1959 – present
Dewpoint Temperature °F 7/11/2006 – present 1/1/1949 – present
Wet Bulb Temperature °F 7/1/1996 – present 1/1/1949 – present
METAR/Observer Remarks N/A 7/1/1996 – present 1/1/1935 – present
Snowfall in
1/1/1949 – present
1/1/1935 – 12/31/1948**
1/1/1935 – present 1/1935 – present 1935 – present 1935 – present
Snow Depth in
1/1/1949 – present
1/1/1935 – 12/31/1948**
1/1/1935 – present 1/1935 – present
Station Pressure inHg or mb 6/9/2006 – present
1/1/1949 – present*
1/1/1935 – 12/31/1948**
Relative Humidity % 8/17/2007 – present
1/1/1949 – present*
1/1/1935 – 12/31/1948**