Photo: Djh57 · CC BY 3.0Hardly any U.S. towns see fresher July days than Coronado
January mornings start at about 48°. By precipitation alone, it ranks drier than 98% of U.S. towns. Decade by decade the climate has edged up, 2.1° above 1901–2000. Long walks are most pleasant from January to December, when afternoons reach 65–76°.
A year in Coronado at a glance
Each month’s typical high and low, and what it brings.
What stands out about Coronado’s climate
Compared with towns across the U.S., with Coronado’s place in California beside it.
What a year in Coronado feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost and day counts come from NOAA’s station at North Island Nas, CA, 4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Coronado’s center in zone 10b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 39°. Plant labels use the zone; frost dates tell you when to plant.
90° days by month
Average days at 90° or more
About 9 inches of rain a year
February is the wettest month and July the driest. Rain falls on about 42 days a year. Snow is rare: about 0.0" in a normal year at North Island Nas, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Coronado
60% of the work is heating. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at North Island Nas, CA.
Living with Coronado’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10b. Frost comes about 1 winter in 500, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, June, July, August, September, October, November and December. 14 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Coronado from natural hazards, earthquakes are the largest share (47%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Coronado and its neighbors
San Diego has the coldest January nights next door (45°, 3° colder) and San Diego the hottest July afternoons (80°, 6° 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 Coronado’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 |
|---|---|---|---|---|
| Coronado, CA | 48° | 74° | 9" | 0.0" |
| Makawao, HI | 53° | 75° | 23" | 0.0" |
| Sequim, WA | 34° | 71° | 18" | 1.4" |
| Bethany, OR | 35° | 81° | 39" | 3.6" |
| Ruidoso, NM | 22° | 82° | 20" | 26" |
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 Coronado averaged 2.1° warmer than the 1900s. The biggest change is in January (+3.0°).
A bigger shift than in 93% 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 Coronado compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Coronado’s place among California’s.
Coronado weather by month
Highs, lows and precipitation from NOAA’s grid at Coronado’s center; snow, wet days and snow on the ground from North Island Nas, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 66° | 48° | 1.7" | 0.0" | 7 | 0 | 54° – 62° |
| February | 65° | 49° | 1.9" | 0.0" | 8 | 0 | 54° – 62° |
| March | 66° | 52° | 1.4" | 0.0" | 6 | 0 | 55° – 65° |
| April | 67° | 54° | 0.6" | 0.0" | 3 | 0 | 57° – 65° |
| May | 68° | 58° | 0.2" | 0.0" | 2 | 0 | 60° – 67° |
| June | 71° | 61° | 0.1" | 0.0" | 1 | 0 | 63° – 70° |
| July | 74° | 65° | 0.0" | 0.0" | 1 | 0 | 66° – 75° |
| August | 76° | 66° | 0.0" | 0.0" | 0 | 0 | 67° – 75° |
| September | 76° | 64° | 0.1" | 0.0" | 1 | 0 | 66° – 74° |
| October | 74° | 59° | 0.3" | 0.0" | 3 | 0 | 63° – 72° |
| November | 70° | 53° | 0.7" | 0.0" | 4 | 0 | 56° – 65° |
| December | 66° | 48° | 1.5" | 0.0" | 7 | 0 | 54° – 60° |
| Year | 70° | 56° | 8.6" | 0.0" | 42 | 0 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 55° to 65°. December is the most reliable, staying within 5°.
Where Coronado’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 Coronado’s center.
- Snow: North Island Nas, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: North Island Nas, CA, 4 miles from the town’s center, at about the same height; 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 Coronado’s climate
What is the weather like in Coronado?
A typical July afternoon reaches 74°, a January night drops to 48°, and snow is almost unheard of. Milder January nights than 96% of U.S. towns; cooler July afternoons than all but 158 U.S. towns.
How cold does it get in Coronado in winter?
December nights average 48°. A night at 32° or below comes in only some winters (0.0 a year on average). In the coldest December of the last 30 years the month averaged 54°.
How much snow does Coronado get?
About 0.0 inches in a normal winter at North Island Nas, CA, so most winters see none.
How hot does it get in Coronado?
July, with a typical high of 74° and a low of 65°. About 4 days a year reach 90° (North Island Nas, CA).
When is the first and last frost in Coronado?
Most years have no frost at all: a 32° night comes in about 0% of winters at North Island Nas, CA, usually in December or January.
What growing zone is Coronado in?
Zone 10b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 39°.
What is the best time of year to visit Coronado?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, July, August, September, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Coronado getting warmer?
Yes: 1991–2020 averaged 2.1° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 93% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Coronado.
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.