Spencer, ID climate
Spencer has cold winters and pleasant summers, with very little rain. A typical July afternoon reaches 82°, a January night drops to 10°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Spencer feels like
Winter
Spring
Summer
Fall
Spencer weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 27° | 10° | 1.0" | 13° – 26° |
| February | 31° | 12° | 0.9" | 16° – 30° |
| March | 41° | 21° | 1.0" | 23° – 38° |
| April | 51° | 28° | 1.4" | 32° – 45° |
| May | 62° | 36° | 2.2" | 43° – 54° |
| June | 71° | 43° | 1.9" | 51° – 63° |
| July | 82° | 49° | 0.9" | 55° – 73° |
| August | 80° | 47° | 0.8" | 58° – 68° |
| September | 70° | 39° | 1.2" | 51° – 60° |
| October | 54° | 29° | 1.3" | 32° – 47° |
| November | 38° | 19° | 0.9" | 21° – 37° |
| December | 27° | 11° | 1.2" | 13° – 24° |
| Year | 53° | 29° | 14.7" |
“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 Spencer
Spencer gets 15 inches of rain and melted snow a year. May is the wettest month and August the driest.
About 106 frost-free days a year
In half of years the last 32° night comes by June 5 and the first one by September 20. That leaves about 106 frost-free days for gardens, shorter than 99% of U.S. towns.
Heating and cooling a home in Spencer
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Spencer, 98% of that work is heating and 2% 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.
How Spencer 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 Spencer averaged 1.2° warmer than the 1900s. The biggest change is in March (+3.6°). The shift is smaller than in 52% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Spencer’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. July swings the most: between 1991 and 2020 its average temperature ranged from 55° to 73°. September is the most reliable, staying within 10°.
Common questions about Spencer’s climate
What is the coldest month in Spencer?
January, with a typical high of 27° and a low of 10°.
What is the hottest month in Spencer?
July, with a typical high of 82° and a low of 49°. About 10 days a year reach 90°.
When is the first frost in Spencer?
In half of years the first 32° night comes by September 20, and the last spring frost by June 5.
What is the rainiest month in Spencer?
May, with 2.2 inches of rain and melted snow. The year totals 15 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Spencer itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Small 6n, ID (12 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.