Upland, CA climate
Upland has warm winters and hot summers, with very little rain. A typical July afternoon reaches 92°, a January night drops to 44°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decade7° warmer than normal today. The forecast high is 93°, and a typical Oct 1 in Upland peaks around 86°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Upland feels like
Winter
Spring
Summer
Fall
Upland 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° | 44° | 4.1" | 0 | 7 | 0 | 51° – 61° |
| February | 67° | 44° | 4.6" | 0 | 7 | 0 | 49° – 65° |
| March | 71° | 47° | 2.9" | 0 | 6 | 0 | 52° – 66° |
| April | 75° | 49° | 1.0" | 0 | 4 | 0 | 56° – 66° |
| May | 78° | 53° | 0.5" | 0 | 3 | 0 | 60° – 73° |
| June | 85° | 57° | 0.1" | 0 | 2 | 0 | 66° – 76° |
| July | 92° | 62° | 0.0" | 0 | 1 | 0 | 73° – 83° |
| August | 94° | 63° | 0.0" | 0 | 0 | 0 | 75° – 83° |
| September | 90° | 61° | 0.1" | 0 | 1 | 0 | 71° – 80° |
| October | 82° | 55° | 0.8" | 0 | 3 | 0 | 64° – 73° |
| November | 73° | 48° | 1.3" | 0 | 3 | 0 | 53° – 65° |
| December | 66° | 43° | 3.0" | 0 | 6 | 0 | 50° – 61° |
| Year | 78° | 52° | 18.4" | 0.0" | 42 | 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 Upland
Upland gets 18 inches of rain and melted snow a year. February is the wettest month and August the driest. Rain or snow falls on about 42 days a year.
A year-round growing season
Heating and cooling a home in Upland
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Upland, 40% of that work is heating and 60% 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.
Upland and its neighbors
Upland borders 4 towns with climate data. January nights across them vary by 2.7°. Ontario has the coldest January nights (43°) and Rancho Cucamonga the hottest July afternoons (93°). Upland’s January low is 44° and its July high 92°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Upland 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 Upland averaged 2.6° warmer than the 1900s. The biggest change is in January (+3.5°). The shift is larger than in 100% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Upland’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 49° to 65°. August is the most reliable, staying within 7°.
Common questions about Upland’s climate
What is the coldest month in Upland?
December, with a typical high of 66° and a low of 43°.
What is the hottest month in Upland?
August, with a typical high of 94° and a low of 63°. About 93 days a year reach 90°.
How much snow does Upland get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Upland?
Frost is uncommon. Only 41% of years see a night at 32° or below.
What is the rainiest month in Upland?
February, with 4.6 inches of rain and melted snow. The year totals 18 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Upland itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Glendora Fc 287b, CA (11 mi, snow) and Ontario Intl Airport, CA (5 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.