Blenheim, NY climate
Blenheim has cold, snowy winters and pleasant summers. A typical July afternoon reaches 79°, a January night drops to 12°, and about 54 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Blenheim feels like
Winter
Spring
Summer
Fall
Blenheim weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 12° | 2.7" | 13.7" | 12 | 21 | 11° – 29° |
| February | 33° | 14° | 2.3" | 10.7" | 10 | 20 | 8° – 30° |
| March | 41° | 21° | 3.1" | 12.4" | 11 | 16 | 23° – 43° |
| April | 55° | 31° | 3.5" | 1.5" | 11 | 3 | 36° – 48° |
| May | 67° | 43° | 3.8" | 0 | 13 | 0 | 50° – 60° |
| June | 74° | 51° | 4.4" | 0 | 13 | 0 | 60° – 67° |
| July | 79° | 56° | 4.1" | 0 | 12 | 0 | 63° – 71° |
| August | 77° | 55° | 4.3" | 0 | 12 | 0 | 62° – 70° |
| September | 70° | 48° | 4.1" | 0 | 11 | 0 | 55° – 63° |
| October | 58° | 37° | 4.1" | 0.4" | 13 | 0 | 43° – 54° |
| November | 46° | 29° | 2.9" | 1.7" | 10 | 3 | 32° – 43° |
| December | 35° | 19° | 3.2" | 13.1" | 11 | 14 | 20° – 39° |
| Year | 55° | 35° | 42.5" | 53.5" | 140 | 78 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Blenheim
Blenheim gets 43 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 140 days a year. Snow covers the ground about 78 days of the year.
About 137 frost-free days a year
In half of years the last 32° night comes by May 18 and the first one by October 2. That leaves about 137 frost-free days for gardens, shorter than 91% of U.S. towns.
Heating and cooling a home in Blenheim
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Blenheim, 95% of that work is heating and 5% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Blenheim and its neighbors
Blenheim borders 4 towns with climate data. January nights across them vary by 1.6°. Summit has the coldest January nights (11°) and Gilboa the hottest July afternoons (81°). Blenheim’s January low is 12° and its July high 79°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Blenheim compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Blenheim averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.9°). The shift is smaller than in 55% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Blenheim’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 8° to 30°. June is the most reliable, staying within 8°.
Common questions about Blenheim’s climate
What is the coldest month in Blenheim?
January, with a typical high of 31° and a low of 12°.
What is the hottest month in Blenheim?
July, with a typical high of 79° and a low of 56°. About 8 days a year reach 90°.
How much snow does Blenheim get?
About 54 inches in a normal winter, most of it in January.
When is the first frost in Blenheim?
In half of years the first 32° night comes by October 2, and the last spring frost by May 18.
What is the rainiest month in Blenheim?
June, with 4.4 inches of rain and melted snow. The year totals 43 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Blenheim itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Cobleskill 2 Ese, NY (13 mi, snow) and Lansing Manor, NY (4 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.