Gilbert, AZ climate
Gilbert has warm winters and scorching summers, with very little rain. A typical July afternoon reaches 106°, a January night drops to 40°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Gilbert feels like
Winter
Spring
Summer
Fall
Gilbert 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 | 67° | 40° | 1.0" | 0 | 4 | 0 | 50° – 59° |
| February | 71° | 43° | 1.1" | 0 | 4 | 0 | 51° – 62° |
| March | 78° | 47° | 0.9" | 0 | 4 | 0 | 55° – 69° |
| April | 85° | 53° | 0.3" | 0 | 1 | 0 | 64° – 74° |
| May | 94° | 61° | 0.1" | 0 | 1 | 0 | 72° – 83° |
| June | 104° | 70° | 0.0" | 0 | 0 | 0 | 82° – 90° |
| July | 106° | 78° | 0.9" | 0 | 3 | 0 | 89° – 95° |
| August | 104° | 77° | 1.1" | 0 | 5 | 0 | 87° – 95° |
| September | 100° | 71° | 0.7" | 0 | 3 | 0 | 81° – 88° |
| October | 89° | 58° | 0.5" | 0 | 3 | 0 | 70° – 78° |
| November | 76° | 46° | 0.6" | 0 | 2 | 0 | 53° – 67° |
| December | 66° | 40° | 0.9" | 0 | 4 | 0 | 50° – 57° |
| Year | 87° | 57° | 8.1" | 0.0" | 34 | 0 |
“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 Gilbert
Gilbert gets 8 inches of rain and melted snow a year. February is the wettest month and June the driest. Rain or snow falls on about 34 days a year.
About 312 frost-free days a year
In half of years the last 32° night comes by February 1 and the first one by December 10. That leaves about 312 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Gilbert
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Gilbert, 24% of that work is heating and 76% is cooling, so air conditioning is the bigger bill.
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.
Gilbert and its neighbors
Gilbert borders 3 towns with climate data. January nights across them vary by 0.6°. Chandler has both the coldest January nights (40°) and the hottest July afternoons (106°). Gilbert’s January low is 40° and its July high 106°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Gilbert 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 Gilbert averaged 2.3° warmer than the 1900s. The biggest change is in March (+3.0°). The shift is larger than in 99% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Gilbert’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 53° to 67°. July is the most reliable, staying within 6°.
Common questions about Gilbert’s climate
What is the coldest month in Gilbert?
December, with a typical high of 66° and a low of 40°.
What is the hottest month in Gilbert?
July, with a typical high of 106° and a low of 78°. About 177 days a year reach 90°.
How much snow does Gilbert get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Gilbert?
In half of years the first 32° night comes by December 10, and the last spring frost by February 1.
What is the rainiest month in Gilbert?
February, with 1.1 inches of rain and melted snow. The year totals 8 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Gilbert itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Mesa, AZ (8 mi, snow) and East Mesa, AZ (9 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.