Ralston, WY climate
Ralston has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 86°, a January night drops to 12°, and about 44 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Ralston feels like
Winter
Spring
Summer
Fall
Ralston 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 | 35° | 12° | 0.3" | 7.7" | 4 | 12 | 15° – 33° |
| February | 39° | 15° | 0.3" | 5.8" | 4 | 7 | 13° – 37° |
| March | 50° | 24° | 0.4" | 7.8" | 5 | 3 | 28° – 44° |
| April | 58° | 31° | 0.9" | 4.5" | 5 | 1 | 39° – 49° |
| May | 67° | 41° | 1.6" | 0.2" | 10 | 0 | 49° – 58° |
| June | 77° | 49° | 1.3" | 0 | 9 | 0 | 56° – 70° |
| July | 86° | 55° | 0.7" | 0 | 8 | 0 | 61° – 76° |
| August | 85° | 53° | 0.6" | 0 | 7 | 0 | 63° – 72° |
| September | 74° | 44° | 1.0" | 0.7" | 7 | 0 | 55° – 64° |
| October | 59° | 32° | 0.8" | 5.7" | 5 | 2 | 37° – 52° |
| November | 45° | 21° | 0.4" | 5.7" | 4 | 7 | 22° – 42° |
| December | 35° | 13° | 0.2" | 6.1" | 3 | 11 | 15° – 29° |
| Year | 59° | 33° | 8.2" | 44.2" | 70 | 43 |
“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 Ralston
Ralston gets 8 inches of rain and melted snow a year. May is the wettest month and December the driest. Rain or snow falls on about 70 days a year. Snow covers the ground about 43 days of the year.
About 132 frost-free days a year
In half of years the last 32° night comes by May 15 and the first one by September 25. That leaves about 132 frost-free days for gardens, shorter than 94% of U.S. towns.
Heating and cooling a home in Ralston
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Ralston, 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.
How Ralston 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 Ralston averaged 1.8° warmer than the 1900s. The biggest change is in January (+4.0°). The shift is larger than in 84% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Ralston’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 13° to 37°. August is the most reliable, staying within 9°.
Common questions about Ralston’s climate
What is the coldest month in Ralston?
January, with a typical high of 35° and a low of 12°.
What is the hottest month in Ralston?
July, with a typical high of 86° and a low of 55°. About 14 days a year reach 90°.
How much snow does Ralston get?
About 44 inches in a normal winter, most of it in March.
When is the first frost in Ralston?
In half of years the first 32° night comes by September 25, and the last spring frost by May 15.
What is the rainiest month in Ralston?
May, with 1.6 inches of rain and melted snow. The year totals 8 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Ralston itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Heart Mtn, WY (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.