Nights stay kind in Larkfield-Wikiup each January, milder than in 86% of U.S. towns
Expect July afternoons of about 84°. From frosty January to warm July, readings climb 47°. By precipitation alone, it ranks drier than 81% of U.S. towns. Radiators earn their keep from December to January, the months that average under 50°.
A year in Larkfield-Wikiup at a glance
Each month’s typical high and low, and what it brings.
What stands out about Larkfield-Wikiup’s climate
Compared with towns across the U.S., with Larkfield-Wikiup’s place in California beside it.
What a year in Larkfield-Wikiup feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 262 frost-free days a year
In half of years the last 32° night comes by March 2 and the first by November 20. Frost and day counts come from NOAA’s station at Santa Rosa Sonoma Co Airport, 3 miles from the town’s center, at about the same height.
The 2023 USDA map puts Larkfield-Wikiup’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 33 inches of rain a year
December is the wettest month and July the driest. Rain falls on about 78 days a year. Snow is rare: about 0.0" in a normal year at Graton, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Larkfield-Wikiup
88% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Santa Rosa Sonoma Co Airport.
Living with Larkfield-Wikiup’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
262 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 20.
Months with highs of 62–84° and lows of 40° or more: February, March, April, May, June, September, October and November. 10 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Larkfield-Wikiup from natural hazards, earthquakes are the largest share (51%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Larkfield-Wikiup and its neighbors
Every town next door is within a degree of Larkfield-Wikiup in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Larkfield-Wikiup’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 |
|---|---|---|---|---|
| Larkfield-Wikiup, CA | 38° | 84° | 33" | 0.0" |
| Winston, OR | 37° | 86° | 33" | 0.0" |
| Felida, WA | 35° | 81° | 42" | 0.8" |
| Kill Devil Hills, NC | 35° | 86° | 50" | 1.1" |
| Port Lavaca, TX | 46° | 91° | 40" | 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 Larkfield-Wikiup averaged 1.5° warmer than the 1900s. The biggest change is in January (+2.4°).
A bigger shift than in 62% 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 Larkfield-Wikiup compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Larkfield-Wikiup’s place among California’s.
Larkfield-Wikiup weather by month
Highs, lows and precipitation from NOAA’s grid at Larkfield-Wikiup’s center; snow, wet days and snow on the ground from Graton, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 58° | 38° | 6.5" | 0.0" | 13 | 0 | 45° – 52° |
| February | 62° | 40° | 6.3" | 0.0" | 12 | 0 | 47° – 56° |
| March | 66° | 41° | 4.7" | 0.0" | 11 | 0 | 48° – 59° |
| April | 70° | 43° | 2.1" | 0.0" | 7 | 0 | 51° – 60° |
| May | 75° | 47° | 1.2" | 0.0" | 4 | 0 | 56° – 66° |
| June | 82° | 50° | 0.3" | 0.0" | 2 | 0 | 63° – 69° |
| July | 84° | 52° | 0.0" | 0.0" | 0 | 0 | 65° – 71° |
| August | 85° | 52° | 0.0" | 0.0" | 1 | 0 | 65° – 72° |
| September | 84° | 50° | 0.1" | 0.0" | 2 | 0 | 64° – 71° |
| October | 77° | 47° | 1.6" | 0.0" | 4 | 0 | 59° – 68° |
| November | 66° | 41° | 3.4" | 0.0" | 9 | 0 | 47° – 57° |
| December | 58° | 38° | 6.8" | 0.0" | 13 | 0 | 44° – 52° |
| Year | 72° | 45° | 33.1" | 0.0" | 78 | 0 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 48° to 59°. June is the most reliable, staying within 6°.
Where Larkfield-Wikiup’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 Larkfield-Wikiup’s center.
- Snow: Graton, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Santa Rosa Sonoma Co Airport, 3 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 Larkfield-Wikiup’s climate
What is the weather like in Larkfield-Wikiup?
A typical July afternoon reaches 84°, a January night drops to 38°, and snow is almost unheard of. Milder January nights than 86% of U.S. towns; cooler July afternoons than 59% of U.S. towns.
How cold does it get in Larkfield-Wikiup in winter?
December nights average 38°. About 31 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 44°.
How much snow does Larkfield-Wikiup get?
About 0.0 inches in a normal winter at Graton, CA, so most winters see none.
How hot does it get in Larkfield-Wikiup?
July, with a typical high of 84° and a low of 52°. About 34 days a year reach 90° and 4 reach 100° (Santa Rosa Sonoma Co Airport).
When is the first and last frost in Larkfield-Wikiup?
In half of years the last spring frost (32°) comes by March 2 and the first fall frost by November 20, about 262 frost-free days, at Santa Rosa Sonoma Co Airport.
What growing zone is Larkfield-Wikiup 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 Larkfield-Wikiup?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March, April, May, June, September, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Larkfield-Wikiup getting warmer?
Yes: 1991–2020 averaged 1.5° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 62% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Larkfield-Wikiup.
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.