Simla, CO climate
Simla has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 87°, a January night drops to 13°, and about 31 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Simla feels like
Winter
Spring
Summer
Fall
Simla 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 | 44° | 13° | 0.4" | 4.7" | 3 | 6 | 19° – 34° |
| February | 45° | 15° | 0.5" | 3.8" | 3 | 6 | 24° – 37° |
| March | 54° | 22° | 1.1" | 6.5" | 5 | 3 | 33° – 44° |
| April | 60° | 29° | 1.9" | 5.6" | 6 | 2 | 39° – 50° |
| May | 70° | 39° | 2.6" | 0.5" | 8 | 0 | 48° – 59° |
| June | 81° | 48° | 2.1" | 0 | 8 | 0 | 61° – 70° |
| July | 87° | 55° | 2.9" | 0 | 9 | 0 | 66° – 74° |
| August | 84° | 53° | 2.6" | 0 | 10 | 0 | 64° – 72° |
| September | 77° | 44° | 1.1" | 0.3" | 5 | 0 | 55° – 66° |
| October | 64° | 32° | 1.1" | 1.8" | 4 | 1 | 39° – 54° |
| November | 52° | 21° | 0.6" | 4.0" | 3 | 4 | 29° – 43° |
| December | 43° | 13° | 0.4" | 4.1" | 3 | 7 | 21° – 33° |
| Year | 63° | 32° | 17.3" | 31.3" | 66 | 29 |
“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 Simla
Simla gets 17 inches of rain and melted snow a year. July is the wettest month and January the driest. Rain or snow falls on about 66 days a year. Snow covers the ground about 29 days of the year.
About 141 frost-free days a year
In half of years the last 32° night comes by May 12 and the first one by October 2. That leaves about 141 frost-free days for gardens, shorter than 88% of U.S. towns.
Heating and cooling a home in Simla
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Simla, 93% of that work is heating and 7% 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 Simla 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 Simla averaged 1.3° warmer than the 1900s. The biggest change is in March (+3.2°). The shift is larger than in 56% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Simla’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from 19° to 34°. July is the most reliable, staying within 8°.
Common questions about Simla’s climate
What is the coldest month in Simla?
January, with a typical high of 44° and a low of 13°.
What is the hottest month in Simla?
July, with a typical high of 87° and a low of 55°. About 22 days a year reach 90°.
How much snow does Simla get?
About 31 inches in a normal winter, most of it in March.
When is the first frost in Simla?
In half of years the first 32° night comes by October 2, and the last spring frost by May 12.
What is the rainiest month in Simla?
July, with 2.9 inches of rain and melted snow. The year totals 17 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Simla itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Rush 1n, CO (19 mi, snow) and Matheson 8 Se, CO (13 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.