Mill Creek Zanja · Photo: Aaron Henderson · CC BY-SA 3.0Mentone reaches 100° on about 21 days a year, more than 95% of U.S. towns
A typical July afternoon reaches 96°, a January night drops to 41°, and snow is almost unheard of.
A year in Mentone at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mentone’s climate
Compared with towns across the U.S., with Mentone’s place in California beside it.
What a year in Mentone feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 21 days a year reach 100°
And 100 days reach 90°. Day counts come from NOAA’s station at March Afb, CA, 14 miles from the town’s center, 400 ft lower; frost dates and degree days from Redlands, CA, 5 miles away.
The 2023 USDA map puts Mentone’s center in zone 10a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 31°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 17 inches of rain a year
February is the wettest month and June the driest. Rain falls on about 43 days a year. Snow is rare: about 0.0" in a normal year at Redlands, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Mentone
48% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Redlands, CA.
Living with Mentone’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10a. Frost comes about 9 winters in 10, so the growing year is set by heat, not cold: 21 days at 100° make midsummer the hard season for gardens.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, October and November. 3.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Mentone from natural hazards, earthquakes are the largest share (50%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Mentone and its neighbors
Every town next door is within a degree of Mentone in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Mentone’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Mentone, CA | 41° | 96° | 17" | 0.0" |
| Corona de Tucson, AZ | 36° | 96° | 14" | 0.1" |
| Del Rio, TX | 40° | 98° | 19" | 0.2" |
| Anthony, NM | 31° | 96° | 9" | 0.0" |
| Medford, OR | 32° | 92° | 19" | 3.4" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Mentone averaged 1.9° warmer than the 1900s. The biggest change is in January (+2.8°).
A bigger shift than in 83% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Mentone compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Mentone’s place among California’s.
Mentone weather by month
Highs, lows and precipitation from NOAA’s grid at Mentone’s center; snow, wet days and snow on the ground from Redlands, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 65° | 41° | 3.3" | 0.0" | 7 | 0 | 49° – 60° |
| February | 66° | 42° | 3.7" | 0.0" | 8 | 0 | 45° – 62° |
| March | 70° | 44° | 2.8" | 0.0" | 6 | 0 | 50° – 65° |
| April | 75° | 47° | 1.2" | 0.0" | 4 | 0 | 55° – 65° |
| May | 80° | 52° | 0.5" | 0.0" | 3 | 0 | 59° – 72° |
| June | 90° | 57° | 0.1" | 0.0" | 1 | 0 | 68° – 78° |
| July | 96° | 63° | 0.2" | 0.0" | 1 | 0 | 75° – 84° |
| August | 97° | 64° | 0.1" | 0.0" | 1 | 0 | 78° – 84° |
| September | 92° | 60° | 0.2" | 0.0" | 1 | 0 | 72° – 80° |
| October | 82° | 53° | 0.6" | 0.0" | 3 | 0 | 63° – 73° |
| November | 72° | 45° | 1.2" | 0.0" | 4 | 0 | 51° – 64° |
| December | 64° | 39° | 2.7" | 0.0" | 6 | 0 | 48° – 58° |
| Year | 79° | 50° | 16.5" | 0.0" | 43 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 45° to 62°. August is the most reliable, staying within 6°.
Where Mentone’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Mentone’s center.
- Snow: Redlands, CA.
- Frost dates, heating and cooling: Redlands, CA, 5 miles away.
- Freezing nights, 90° and 100° days: March Afb, CA, 14 miles from the town’s center, 400 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Mentone’s climate
What is the weather like in Mentone?
A typical July afternoon reaches 96°, a January night drops to 41°, and snow is almost unheard of. Milder January nights than 89% of U.S. towns; hotter July afternoons than 97% of U.S. towns.
How cold does it get in Mentone in winter?
December nights average 39°. About 25 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 48°.
How much snow does Mentone get?
About 0.0 inches in a normal winter at Redlands, CA, so most winters see none.
How hot does it get in Mentone?
July, with a typical high of 96° and a low of 63°. About 100 days a year reach 90° and 21 reach 100° (Redlands, CA).
When is the first and last frost in Mentone?
There is no reliable frost date: a 32° night comes in about 88% of winters at Redlands, CA, so most years bring a freeze but some pass without one.
What growing zone is Mentone in?
Zone 10a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 31°.
What is the best time of year to visit Mentone?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Mentone getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 83% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mentone.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.