Photo: Perdelsky at English Wikipedia · Public domainRamona is drier than 93% of U.S. towns: 15 inches of precipitation a year
In July the day’s top temperature is typically 91°. In January, nights here are milder than in 87% of U.S. towns. Decade by decade the climate has edged up, 2.2° above 1901–2000. Seedlings are safe outdoors from about March 4, with the first autumn frost due around December 4.
A year in Ramona at a glance
Each month’s typical high and low, and what it brings.
What stands out about Ramona’s climate
Compared with towns across the U.S., with Ramona’s place in California beside it.
What a year in Ramona feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 270 frost-free days a year
In half of years the last 32° night comes by March 4 and the first by December 4. Day counts come from NOAA’s station at Ramona Airport, 2.3 miles from the town’s center, 110 ft lower; frost dates and degree days from Ramona Fire Dept, CA, 3.0 miles away.
The 2023 USDA map puts Ramona’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 27°. 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 15 inches of rain a year
February is the wettest month and June the driest. Rain falls on about 41 days a year. Snow is rare: about 0.0" in a normal year at Poway Valley, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Ramona
65% of the work is heating. 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 Ramona Fire Dept, CA.
Living with Ramona’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
270 frost-free days in zone 9b. The last frost comes by Mar 4 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 4.
Months with highs of 62–84° and lows of 40° or more: February, March, April, May, October and November. 13 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Ramona from natural hazards, wildfire is the largest share (71%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Ramona and its neighbors
San Diego Country Estates the hottest July afternoons (93°, 2° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Ramona’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 |
|---|---|---|---|---|
| Ramona, CA | 39° | 91° | 15" | 0.0" |
| Sierra Vista, AZ | 32° | 91° | 14" | 0.4" |
| Ashland, OR | 31° | 91° | 19" | 0.5" |
| Alpine, TX | 30° | 90° | 15" | 2.2" |
| Chaparral, NM | 31° | 95° | 9" | 0.0" |
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 Ramona averaged 2.2° warmer than the 1900s. The biggest change is in January (+3.4°).
A bigger shift than in 96% 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 Ramona compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Ramona’s place among California’s.
Ramona weather by month
Highs, lows and precipitation from NOAA’s grid at Ramona’s center; snow, wet days and snow on the ground from Poway Valley, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 67° | 39° | 3.2" | 0.0" | 7 | 0 | 49° – 59° |
| February | 67° | 40° | 3.6" | 0.0" | 7 | 0 | 49° – 60° |
| March | 70° | 43° | 2.3" | 0.0" | 6 | 0 | 51° – 63° |
| April | 74° | 45° | 1.1" | 0.0" | 4 | 0 | 55° – 63° |
| May | 78° | 50° | 0.5" | 0.0" | 3 | 0 | 59° – 70° |
| June | 85° | 53° | 0.1" | 0.0" | 1 | 0 | 65° – 74° |
| July | 91° | 58° | 0.1" | 0.0" | 1 | 0 | 70° – 81° |
| August | 93° | 60° | 0.1" | 0.0" | 0 | 0 | 73° – 80° |
| September | 90° | 57° | 0.2" | 0.0" | 1 | 0 | 70° – 77° |
| October | 82° | 50° | 0.6" | 0.0" | 2 | 0 | 62° – 71° |
| November | 74° | 43° | 1.3" | 0.0" | 4 | 0 | 51° – 63° |
| December | 66° | 38° | 2.2" | 0.0" | 6 | 0 | 49° – 57° |
| Year | 78° | 48° | 15.2" | 0.0" | 41 | 0 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 51° to 63°. August is the most reliable, staying within 7°.
Where Ramona’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 Ramona’s center.
- Snow: Poway Valley, CA.
- Frost dates, heating and cooling: Ramona Fire Dept, CA, 3.0 miles away.
- Freezing nights, 90° and 100° days: Ramona Airport, 2.3 miles from the town’s center, 110 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 Ramona’s climate
What is the weather like in Ramona?
A typical July afternoon reaches 91°, a January night drops to 39°, and snow is almost unheard of. Milder January nights than 87% of U.S. towns; hotter July afternoons than 84% of U.S. towns.
How cold does it get in Ramona in winter?
December nights average 38°. About 40 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 49°.
How much snow does Ramona get?
About 0.0 inches in a normal winter at Poway Valley, CA, so most winters see none.
How hot does it get in Ramona?
July, with a typical high of 91° and a low of 58°. About 62 days a year reach 90° and 7 reach 100° (Ramona Fire Dept, CA).
When is the first and last frost in Ramona?
In half of years the last spring frost (32°) comes by March 4 and the first fall frost by December 4, about 270 frost-free days, at Ramona Fire Dept, CA.
What growing zone is Ramona in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 27°.
What is the best time of year to visit Ramona?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Ramona getting warmer?
Yes: 1991–2020 averaged 2.2° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 96% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Ramona.
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.