Wiley, CO climate
Wiley has chilly winters and hot summers, with very little rain. A typical July afternoon reaches 94°, a January night drops to 16°, and about 30 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Wiley feels like
Winter
Spring
Summer
Fall
Wiley 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 | 46° | 16° | 0.3" | 6.3" | 3 | 5 | 16° – 37° |
| February | 50° | 20° | 0.3" | 5.4" | 3 | 4 | 24° – 42° |
| March | 61° | 29° | 0.7" | 4.7" | 4 | 2 | 39° – 51° |
| April | 69° | 37° | 1.3" | 1.7" | 6 | 1 | 47° – 57° |
| May | 78° | 48° | 1.9" | 0.1" | 8 | 0 | 57° – 69° |
| June | 90° | 58° | 2.1" | 0 | 7 | 0 | 68° – 79° |
| July | 94° | 63° | 2.7" | 0 | 8 | 0 | 74° – 83° |
| August | 91° | 61° | 2.6" | 0 | 7 | 0 | 71° – 81° |
| September | 84° | 53° | 1.0" | 0 | 5 | 0 | 62° – 74° |
| October | 71° | 38° | 1.1" | 2.1" | 4 | 1 | 47° – 60° |
| November | 57° | 26° | 0.4" | 3.6" | 3 | 2 | 34° – 47° |
| December | 46° | 17° | 0.3" | 5.9" | 3 | 5 | 23° – 38° |
| Year | 70° | 39° | 14.6" | 29.8" | 62 | 19 |
“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 Wiley
Wiley gets 15 inches of rain and melted snow a year. July is the wettest month and January the driest. Rain or snow falls on about 62 days a year. Snow covers the ground about 19 days of the year.
About 163 frost-free days a year
In half of years the last 32° night comes by April 30 and the first one by October 10. That leaves about 163 frost-free days for gardens, shorter than 68% of U.S. towns.
Heating and cooling a home in Wiley
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Wiley, 82% of that work is heating and 18% 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 Wiley 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 Wiley averaged 1.2° warmer than the 1900s. The biggest change is in March (+2.9°). The shift is larger than in 50% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Wiley’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 16° to 37°. July is the most reliable, staying within 9°.
Common questions about Wiley’s climate
What is the coldest month in Wiley?
January, with a typical high of 46° and a low of 16°.
What is the hottest month in Wiley?
July, with a typical high of 94° and a low of 63°. About 73 days a year reach 90°.
How much snow does Wiley get?
About 30 inches in a normal winter, most of it in January.
When is the first frost in Wiley?
In half of years the first 32° night comes by October 10, and the last spring frost by April 30.
What is the rainiest month in Wiley?
July, with 2.7 inches of rain and melted snow. The year totals 15 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Wiley itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lamar, CO (6 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.