Loma Mar, CA climate
Loma Mar has warm winters and pleasant summers. A typical July afternoon reaches 77°, a January night drops to 40°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Loma Mar feels like
Winter
Spring
Summer
Fall
Loma Mar 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 | 59° | 40° | 6.2" | 0 | 9 | 0 | 47° – 55° |
| February | 61° | 41° | 6.1" | 0 | 9 | 0 | 47° – 56° |
| March | 63° | 42° | 4.7" | 0 | 9 | 0 | 48° – 57° |
| April | 65° | 43° | 2.2" | 0 | 5 | 0 | 51° – 58° |
| May | 69° | 47° | 0.9" | 0 | 3 | 0 | 54° – 62° |
| June | 74° | 49° | 0.2" | 0 | 1 | 0 | 58° – 65° |
| July | 77° | 52° | 0.0" | 0 | 0 | 0 | 62° – 67° |
| August | 78° | 52° | 0.1" | 0 | 0 | 0 | 63° – 69° |
| September | 78° | 51° | 0.1" | 0 | 1 | 0 | 61° – 68° |
| October | 73° | 47° | 1.3" | 0 | 3 | 0 | 57° – 66° |
| November | 64° | 42° | 3.2" | 0 | 6 | 0 | 47° – 57° |
| December | 59° | 40° | 6.2" | 0 | 9 | 0 | 45° – 54° |
| Year | 68° | 46° | 31.2" | 0.0" | 55 | 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 Loma Mar
Loma Mar gets 31 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 55 days a year.
About 275 frost-free days a year
In half of years the last 32° night comes by March 21 and the first one by December 15. That leaves about 275 frost-free days for gardens, longer than 93% of U.S. towns.
Heating and cooling a home in Loma Mar
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Loma Mar, 83% of that work is heating and 17% is cooling, so the furnace matters far more than the air conditioner.
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.
How Loma Mar 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 Loma Mar averaged 1.9° warmer than the 1900s. The biggest change is in January (+2.3°). The shift is larger than in 91% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Loma Mar’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 47° to 57°. July is the most reliable, staying within 6°.
Common questions about Loma Mar’s climate
What is the coldest month in Loma Mar?
December, with a typical high of 59° and a low of 40°.
What is the hottest month in Loma Mar?
August, with a typical high of 78° and a low of 52°. About 13 days a year reach 90°.
How much snow does Loma Mar get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Loma Mar?
In half of years the first 32° night comes by December 15, and the last spring frost by March 21.
What is the rainiest month in Loma Mar?
December, with 6.2 inches of rain and melted snow. The year totals 31 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Loma Mar itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Redwood City, CA (15 mi, snow) and Skyline Ridge Preserve, CA (7 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.