Fontenelle, WY climate
Fontenelle has cold winters and warm summers, with very little rain. A typical July afternoon reaches 84°, a January night drops to 2°, and about 27 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Fontenelle feels like
Winter
Spring
Summer
Fall
Fontenelle 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 | 29° | 2° | 0.3" | 5.4" | 3 | 20 | 7° – 24° |
| February | 32° | 6° | 0.3" | 6.6" | 4 | 20 | 11° – 30° |
| March | 44° | 18° | 0.5" | 3.8" | 5 | 8 | 23° – 37° |
| April | 54° | 24° | 0.7" | 2.2" | 5 | 1 | 32° – 44° |
| May | 64° | 33° | 1.3" | 0.6" | 8 | 0 | 43° – 53° |
| June | 75° | 40° | 0.8" | 0 | 5 | 0 | 52° – 63° |
| July | 84° | 46° | 0.5" | 0 | 5 | 0 | 56° – 70° |
| August | 82° | 44° | 0.8" | 0 | 6 | 0 | 58° – 66° |
| September | 72° | 35° | 0.9" | 0 | 6 | 0 | 50° – 57° |
| October | 58° | 25° | 0.6" | 1.3" | 4 | 1 | 33° – 47° |
| November | 42° | 14° | 0.3" | 2.1" | 3 | 5 | 16° – 34° |
| December | 29° | 3° | 0.3" | 4.5" | 4 | 18 | 10° – 25° |
| Year | 55° | 24° | 7.1" | 26.5" | 58 | 74 |
“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 Fontenelle
Fontenelle gets 7 inches of rain and melted snow a year. May is the wettest month and December the driest. Rain or snow falls on about 58 days a year. Snow covers the ground about 74 days of the year.
A year-round growing season
Heating and cooling a home in Fontenelle
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Fontenelle, 99% of that work is heating and 1% 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 Fontenelle 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 Fontenelle averaged 1.6° warmer than the 1900s. The biggest change is in March (+3.8°). The shift is larger than in 74% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Fontenelle’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 11° to 30°. September is the most reliable, staying within 7°.
Common questions about Fontenelle’s climate
What is the coldest month in Fontenelle?
January, with a typical high of 29° and a low of 2°.
What is the hottest month in Fontenelle?
July, with a typical high of 84° and a low of 46°. About 4 days a year reach 90°.
How much snow does Fontenelle get?
About 27 inches in a normal winter, most of it in February.
When is the first frost in Fontenelle?
Frost is uncommon. Only 100% of years see a night at 32° or below.
What is the rainiest month in Fontenelle?
May, with 1.3 inches of rain and melted snow. The year totals 7 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Fontenelle itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Fontenelle Dam, WY (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.