Lewistown Heights, MT climate
Lewistown Heights has cold, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 82°, a January night drops to 13°, and about 112 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Lewistown Heights feels like
Winter
Spring
Summer
Fall
Lewistown Heights 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 35° | 13° | 0.6" | 17.5" | 7 | 13° – 35° |
| February | 37° | 13° | 0.5" | 16.4" | 7 | 4° – 36° |
| March | 46° | 21° | 0.9" | 19.5" | 8 | 19° – 42° |
| April | 54° | 28° | 1.8" | 17.2" | 9 | 35° – 46° |
| May | 63° | 37° | 3.1" | 3.1" | 11 | 46° – 55° |
| June | 72° | 45° | 3.4" | 0.2" | 13 | 54° – 64° |
| July | 82° | 51° | 1.8" | 0 | 10 | 56° – 73° |
| August | 81° | 49° | 1.7" | 0 | 8 | 59° – 71° |
| September | 71° | 41° | 1.6" | 2.1" | 7 | 51° – 62° |
| October | 57° | 30° | 1.4" | 8.8" | 7 | 35° – 49° |
| November | 44° | 21° | 0.7" | 11.2" | 6 | 23° – 42° |
| December | 36° | 13° | 0.6" | 16.1" | 6 | 14° – 32° |
| Year | 56° | 30° | 18.1" | 112.1" | 98 |
“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 Lewistown Heights
Lewistown Heights gets 18 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 98 days a year.
About 119 frost-free days a year
In half of years the last 32° night comes by May 23 and the first one by September 21. That leaves about 119 frost-free days for gardens, shorter than 97% of U.S. towns.
Heating and cooling a home in Lewistown Heights
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Lewistown Heights, 97% of that work is heating and 3% 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 Lewistown Heights 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 Lewistown Heights averaged 1.0° warmer than the 1900s. The biggest change is in January (+4.5°). The shift is smaller than in 69% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Lewistown Heights’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 4° to 36°. May is the most reliable, staying within 9°.
Common questions about Lewistown Heights’s climate
What is the coldest month in Lewistown Heights?
January, with a typical high of 35° and a low of 13°.
What is the hottest month in Lewistown Heights?
July, with a typical high of 82° and a low of 51°. About 13 days a year reach 90°.
How much snow does Lewistown Heights get?
About 112 inches in a normal winter, most of it in March.
When is the first frost in Lewistown Heights?
In half of years the first 32° night comes by September 21, and the last spring frost by May 23.
What is the rainiest month in Lewistown Heights?
June, with 3.4 inches of rain and melted snow. The year totals 18 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Lewistown Heights itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lewistown 11 Sse, MT (12 mi, snow) and Lewistown Municipal Airport, MT (2 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.