Few U.S. towns have warmer summer afternoons than Lake Isabella
The depth of winter brings overnight lows near 31°. The gap between a January night and a July afternoon is 68°. Its yearly precipitation falls short of 97% of U.S. towns. Warm coats and heating bills mark the months from December to February, when means dip under 50°.
A year in Lake Isabella at a glance
Each month’s typical high and low, and what it brings.
What stands out about Lake Isabella’s climate
Compared with towns across the U.S., with Lake Isabella’s place in California beside it.
What a year in Lake Isabella feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 212 frost-free days a year
In half of years the last 32° night comes by April 5 and the first by November 3. Frost and day counts come from S Lake Fs, CA, 7 miles away.
The 2023 USDA map puts Lake Isabella’s center in zone 9a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 23°. 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 11 inches of rain a year
January is the wettest month and July the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Lake Isabella
64% of the work is heating. 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 S Lake Fs, CA.
Living with Lake Isabella’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
212 frost-free days in zone 9a. The last frost comes by Apr 5 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 3.
Months with highs of 62–84° and lows of 40° or more: April, May and October. 46 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Lake Isabella from natural hazards, river flooding is the largest share (72%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Lake Isabella and similar climates
TownRatings has no climate map of the towns around Lake Isabella 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 Lake Isabella averaged 1.9° warmer than the 1900s. The biggest change is in June (+2.6°).
A bigger shift than in 83% 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 Lake Isabella compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Lake Isabella’s place among California’s.
Lake Isabella weather by month
Highs, lows and precipitation from NOAA’s grid at Lake Isabella’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 60° | 31° | 2.4" | 41° – 51° |
| February | 62° | 34° | 2.2" | 41° – 56° |
| March | 67° | 38° | 1.8" | 45° – 59° |
| April | 73° | 41° | 0.8" | 52° – 61° |
| May | 82° | 49° | 0.4" | 57° – 73° |
| June | 92° | 57° | 0.1" | 67° – 79° |
| July | 98° | 62° | 0.1" | 76° – 84° |
| August | 97° | 61° | 0.1" | 75° – 83° |
| September | 92° | 54° | 0.1" | 68° – 77° |
| October | 80° | 44° | 0.4" | 58° – 68° |
| November | 67° | 36° | 0.9" | 43° – 57° |
| December | 59° | 30° | 2.0" | 41° – 49° |
| Year | 77° | 45° | 11.2" |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 57° to 73°. August is the most reliable, staying within 7°.
Where Lake Isabella’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 Lake Isabella’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: S Lake Fs, CA, 7 miles from the town’s center, 590 ft lower; no station nearby passes every check; this is the nearest one in the same valley, flagged above.
- 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 Lake Isabella’s climate
What is the weather like in Lake Isabella?
A typical July afternoon reaches 98°, a January night drops to 31°. Milder January nights than 73% of U.S. towns; hotter July afternoons than all but 187 U.S. towns.
How cold does it get in Lake Isabella in winter?
December nights average 30°. About 80 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 41°.
How hot does it get in Lake Isabella?
July, with a typical high of 98° and a low of 62°. About 114 days a year reach 90° and 43 reach 100° (S Lake Fs, CA).
When is the first and last frost in Lake Isabella?
In half of years the last spring frost (32°) comes by April 5 and the first fall frost by November 3, about 212 frost-free days, at S Lake Fs, CA.
What growing zone is Lake Isabella in?
Zone 9a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 23°.
What is the best time of year to visit Lake Isabella?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Lake Isabella getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 83% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Lake Isabella.
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.