Few U.S. towns have cooler summers than Loma Mar
In January the night’s low is typically 40°. Winters are mild: January nights here are milder than in 89% of U.S. towns. Since 1901–2000, the year has warmed by 1.9°, most of all in January. Plan time outside from March to November, when highs sit at 63–78°.
A year in Loma Mar at a glance
Each month’s typical high and low, and what it brings.
What stands out about Loma Mar’s climate
Compared with towns across the U.S., with Loma Mar’s place in California beside it.
What a year in Loma Mar feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 268 frost-free days a year
In half of years the last 32° night comes by March 2 and the first by November 25. Frost and day counts come from NOAA’s station at San Gregorio 2 Se, CA, 5 miles from the town’s center, 440 ft lower.
The 2023 USDA map puts Loma Mar’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 28°. 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 31 inches of rain a year
December is the wettest month and July the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Loma Mar
99% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from November through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at San Gregorio 2 Se, CA.
Living with Loma Mar’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
268 frost-free days in zone 9b. The last frost comes by Mar 2 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 25.
Months with highs of 62–84° and lows of 40° or more: March, April, May, June, July, August, September, October and November. 1.7 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Loma Mar from natural hazards, earthquakes are the largest share (31%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Loma Mar and similar climates
TownRatings has no climate map of the towns around Loma Mar yet.
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Loma Mar averaged 1.9° warmer than the 1900s. The biggest change is in January (+2.3°).
A bigger shift than in 84% 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 Loma Mar compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Loma Mar’s place among California’s.
Loma Mar weather by month
Highs, lows and precipitation from NOAA’s grid at Loma Mar’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 59° | 40° | 6.2" | 47° – 55° |
| February | 61° | 41° | 6.1" | 47° – 56° |
| March | 63° | 42° | 4.7" | 48° – 57° |
| April | 65° | 43° | 2.2" | 51° – 58° |
| May | 69° | 47° | 0.9" | 54° – 62° |
| June | 74° | 49° | 0.2" | 58° – 65° |
| July | 77° | 52° | 0.0" | 62° – 67° |
| August | 78° | 52° | 0.1" | 63° – 69° |
| September | 78° | 51° | 0.1" | 61° – 68° |
| October | 73° | 47° | 1.3" | 57° – 66° |
| November | 64° | 42° | 3.2" | 47° – 57° |
| December | 59° | 40° | 6.2" | 45° – 54° |
| Year | 68° | 46° | 31.2" |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 47° to 57°. July is the most reliable, staying within 6°.
Where Loma Mar’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 Loma Mar’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: San Gregorio 2 Se, CA, 5 miles from the town’s center, 440 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 Loma Mar’s climate
What is the weather like in Loma Mar?
A typical July afternoon reaches 77°, a January night drops to 40°. Milder January nights than 89% of U.S. towns; cooler July afternoons than 97% of U.S. towns.
How cold does it get in Loma Mar in winter?
December nights average 40°. About 16 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 45°.
How hot does it get in Loma Mar?
July, with a typical high of 77° and a low of 52°. About 2 days a year reach 90° (San Gregorio 2 Se, CA).
When is the first and last frost in Loma Mar?
In half of years the last spring frost (32°) comes by March 2 and the first fall frost by November 25, about 268 frost-free days, at San Gregorio 2 Se, CA.
What growing zone is Loma Mar in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 28°.
What is the best time of year to visit Loma Mar?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, June, July, August, September, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Loma Mar getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 84% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Loma Mar.
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.