Cabin Creek Ranger Residence and Dormitory · Photo: National Park Service · Public domainJuly in Hartland runs hotter than in 89% of U.S. towns
January nights here settle around 37°. By precipitation alone, it ranks drier than 87% of U.S. towns. September has warmed most since 1901–2000, part of a 1.6° rise. Radiators earn their keep from December to February, the months that average under 50°.
A year in Hartland at a glance
Each month’s typical high and low, and what it brings.
What stands out about Hartland’s climate
Compared with towns across the U.S., with Hartland’s place in California beside it.
What a year in Hartland feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 273 frost-free days a year
In half of years the last 32° night comes by March 12 and the first by December 9. Frost dates and degree days from Ash Mtn, CA, 13 miles away.
The 2023 USDA map puts Hartland’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 17°. 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 25 inches of rain a year
January is the wettest month and August the driest. Rain falls on about 63 days a year. Snow is rare: about 0.2" in a normal year at Ash Mtn, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Hartland
56% of the work is heating. 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 Ash Mtn, CA.
Living with Hartland’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
273 frost-free days in zone 8b. The last frost comes by Mar 12 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 9.
Months with highs of 62–84° and lows of 40° or more: April, May, October and November. 0.9 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Hartland from natural hazards, river flooding is the largest share (37%); heat waves, cold waves, winter storms and ice storms together are 4%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Hartland and similar climates
TownRatings has no climate map of the towns around Hartland yet.
Climates most like Hartland’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 |
|---|---|---|---|---|
| Hartland, CA | 37° | 92° | 25" | 0.2" |
| Fredericksburg, TX | 35° | 94° | 30" | 0.2" |
| Eagle Point, OR | 32° | 92° | 23" | 3.4" |
| Sierra Vista Southeast, AZ | 32° | 91° | 15" | 0.7" |
| Lawton, OK | 29° | 96° | 32" | 1.8" |
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 Hartland averaged 1.6° warmer than the 1900s. The biggest change is in September (+2.4°).
A bigger shift than in 65% 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 Hartland compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Hartland’s place among California’s.
Hartland weather by month
Highs, lows and precipitation from NOAA’s grid at Hartland’s center; snow, wet days and snow on the ground from Ash Mtn, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 55° | 37° | 4.8" | 0.1" | 9 | 0 | 42° – 54° |
| February | 57° | 38° | 4.7" | 0.0" | 11 | 0 | 41° – 54° |
| March | 61° | 40° | 4.2" | 0.1" | 10 | 0 | 42° – 58° |
| April | 66° | 43° | 2.4" | 0.0" | 7 | 0 | 48° – 59° |
| May | 75° | 50° | 1.1" | 0.0" | 5 | 0 | 52° – 71° |
| June | 84° | 58° | 0.3" | 0.0" | 1 | 0 | 63° – 76° |
| July | 92° | 66° | 0.1" | 0.0" | 1 | 0 | 75° – 83° |
| August | 92° | 65° | 0.0" | 0.0" | 0 | 0 | 75° – 82° |
| September | 86° | 60° | 0.2" | 0.0" | 2 | 0 | 68° – 77° |
| October | 75° | 51° | 1.3" | 0.0" | 4 | 0 | 58° – 69° |
| November | 62° | 42° | 2.1" | 0.0" | 6 | 0 | 43° – 58° |
| December | 54° | 37° | 4.0" | 0.0" | 8 | 0 | 41° – 52° |
| Year | 72° | 49° | 25.1" | 0.2" | 63 | 0 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 52° to 71°. August is the most reliable, staying within 7°.
Where Hartland’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 Hartland’s center.
- Snow: Ash Mtn, CA.
- Frost dates, heating and cooling: Ash Mtn, CA, 13 miles away.
- 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 Hartland’s climate
What is the weather like in Hartland?
A typical July afternoon reaches 92°, a January night drops to 37°, and snow is almost unheard of. Milder January nights than 85% of U.S. towns; hotter July afternoons than 89% of U.S. towns.
How cold does it get in Hartland in winter?
December nights average 37°. About 23 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 41°.
How much snow does Hartland get?
About 0.2 inches in a normal winter at Ash Mtn, CA, so most winters see none.
How hot does it get in Hartland?
July, with a typical high of 92° and a low of 66°. About 112 days a year reach 90° (Ash Mtn, CA).
When is the first and last frost in Hartland?
In half of years the last spring frost (32°) comes by March 12 and the first fall frost by December 9, about 273 frost-free days, at Ash Mtn, CA.
What growing zone is Hartland in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 17°.
What is the best time of year to visit Hartland?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Hartland getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 65% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Hartland.
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.