Midwinter lows in West Whittier-Los Nietos stay above those of 95% of U.S. towns
On a normal July day the thermometer tops out near 86°. By precipitation alone, it ranks drier than 95% of U.S. towns. January has warmed most since 1901–2000, part of a 2.5° rise. Comfortable outdoor weather lasts from October to June, with highs of 69–81°.
A year in West Whittier-Los Nietos at a glance
Each month’s typical high and low, and what it brings.
What stands out about West Whittier-Los Nietos’ climate
Compared with towns across the U.S., with West Whittier-Los Nietos’ place in California beside it.
What a year in West Whittier-Los Nietos 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 San Gabriel Fire Dept, CA, 8 miles from the town’s center, 200 ft higher.
The 2023 USDA map puts West Whittier-Los Nietos’ center in zone 10b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 36°. 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 13 inches of rain a year
February is the wettest month and August the driest. Rain falls on about 32 days a year. Snow is rare: about 0.0" in a normal year at Whittier City Yard Fc106c, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in West Whittier-Los Nietos
43% of the work is heating, so air conditioning is the bigger bill. 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 San Gabriel Fire Dept, CA.
Living with West Whittier-Los Nietos’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10b. Frost comes about 1 winter in 7, 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, October, November and December. 0.6 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in West Whittier-Los Nietos from natural hazards, earthquakes are the largest share (58%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →West Whittier-Los Nietos and its neighbors
Every town next door is within a degree of West Whittier-Los Nietos in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like West Whittier-Los Nietos’, 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 |
|---|---|---|---|---|
| West Whittier-Los Nietos, CA | 47° | 86° | 13" | 0.0" |
| Ewa Beach, HI | 62° | 87° | 17" | 0.0" |
| Port Isabel, TX | 52° | 92° | 26" | 0.2" |
| Sierra Vista Southeast, AZ | 32° | 91° | 15" | 0.7" |
| The Dalles, OR | 31° | 88° | 15" | 5.5" |
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 West Whittier-Los Nietos averaged 2.5° warmer than the 1900s. The biggest change is in January (+3.4°).
A bigger shift than in all but 61 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 West Whittier-Los Nietos compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with West Whittier-Los Nietos’ place among California’s.
West Whittier-Los Nietos weather by month
Highs, lows and precipitation from NOAA’s grid at West Whittier-Los Nietos’ center; snow, wet days and snow on the ground from Whittier City Yard Fc106c, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 69° | 47° | 3.0" | 0.0" | 6 | 0 | 54° – 64° |
| February | 69° | 48° | 3.4" | 0.0" | 7 | 0 | 53° – 66° |
| March | 72° | 50° | 2.0" | 0.0" | 4 | 0 | 55° – 68° |
| April | 75° | 52° | 0.7" | 0.0" | 3 | 0 | 59° – 68° |
| May | 77° | 57° | 0.3" | 0.0" | 1 | 0 | 62° – 72° |
| June | 81° | 60° | 0.0" | 0.0" | 0 | 0 | 67° – 74° |
| July | 86° | 64° | 0.0" | 0.0" | 0 | 0 | 71° – 80° |
| August | 88° | 64° | 0.0" | 0.0" | 0 | 0 | 73° – 79° |
| September | 87° | 62° | 0.1" | 0.0" | 0 | 0 | 71° – 79° |
| October | 81° | 58° | 0.5" | 0.0" | 2 | 0 | 65° – 75° |
| November | 75° | 51° | 0.8" | 0.0" | 3 | 0 | 57° – 67° |
| December | 69° | 46° | 2.2" | 0.0" | 6 | 0 | 54° – 62° |
| Year | 77° | 55° | 13.0" | 0.0" | 32 | 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 68°. August is the most reliable, staying within 6°.
Where West Whittier-Los Nietos’ 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 West Whittier-Los Nietos’ center.
- Snow: Whittier City Yard Fc106c, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: San Gabriel Fire Dept, CA, 8 miles from the town’s center, 200 ft higher; 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 West Whittier-Los Nietos’ climate
What is the weather like in West Whittier-Los Nietos?
A typical July afternoon reaches 86°, a January night drops to 47°, and snow is almost unheard of. Milder January nights than 95% of U.S. towns; hotter July afternoons than 56% of U.S. towns.
How cold does it get in West Whittier-Los Nietos in winter?
December nights average 46°. About 1 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 54°.
How much snow does West Whittier-Los Nietos get?
About 0.0 inches in a normal winter at Whittier City Yard Fc106c, CA, so most winters see none.
How hot does it get in West Whittier-Los Nietos?
July, with a typical high of 86° and a low of 64°. About 65 days a year reach 90° and 7 reach 100° (San Gabriel Fire Dept, CA).
When is the first and last frost in West Whittier-Los Nietos?
Most years have no frost at all: a 32° night comes in about 15% of winters at San Gabriel Fire Dept, CA, usually in December or January.
What growing zone is West Whittier-Los Nietos in?
Zone 10b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 36°.
What is the best time of year to visit West Whittier-Los Nietos?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is West Whittier-Los Nietos getting warmer?
Yes: 1991–2020 averaged 2.5° warmer than 1901–2000 on NOAA’s grid. A bigger shift than all but 61 U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in West Whittier-Los Nietos.
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.