Diamond Springs reaches 100° on about 12 days a year, more than 92% of U.S. towns
January nights here settle around 37°. The wettest month is January; the driest is July. Winters are mild: January nights here are milder than in 85% of U.S. towns. Warm coats and heating bills mark the months from December to February, when means dip under 50°.
A year in Diamond Springs at a glance
Each month’s typical high and low, and what it brings.
What stands out about Diamond Springs’ climate
Compared with towns across the U.S., with Diamond Springs’ place in California beside it.
What a year in Diamond Springs feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 237 frost-free days a year
In half of years the last 32° night comes by March 31 and the first by November 21. Frost and day counts come from NOAA’s station at Placerville, CA, 0.8 miles from the town’s center, 150 ft higher.
The 2023 USDA map puts Diamond Springs’ center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 25°. 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 36 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 Diamond Springs
71% 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 Placerville, CA.
Living with Diamond Springs’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
237 frost-free days in zone 9b. The last frost comes by Mar 31 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 21.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November. 1.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Diamond Springs from natural hazards, wildfire is the largest share (51%); heat waves, cold waves, winter storms and ice storms together are 2%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Diamond Springs and its neighbors
Every town next door is within a degree of Diamond Springs in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
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 Diamond Springs averaged 0.8° warmer than the 1900s. The biggest change is in January (+1.8°).
A smaller shift than in 88% 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 Diamond Springs compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Diamond Springs’ place among California’s.
Diamond Springs weather by month
Highs, lows and precipitation from NOAA’s grid at Diamond Springs’ center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 56° | 37° | 6.6" | 43° – 53° |
| February | 59° | 39° | 6.4" | 43° – 55° |
| March | 62° | 41° | 5.8" | 44° – 58° |
| April | 68° | 44° | 3.3" | 50° – 60° |
| May | 76° | 50° | 1.9" | 54° – 71° |
| June | 86° | 56° | 0.4" | 65° – 76° |
| July | 94° | 62° | 0.0" | 73° – 82° |
| August | 93° | 61° | 0.1" | 72° – 81° |
| September | 87° | 57° | 0.3" | 67° – 76° |
| October | 76° | 50° | 1.7" | 59° – 69° |
| November | 63° | 42° | 3.5" | 44° – 57° |
| December | 55° | 37° | 6.4" | 42° – 49° |
| Year | 73° | 48° | 36.4" |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 54° to 71°. December is the most reliable, staying within 7°.
Where Diamond Springs’ 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 Diamond Springs’ center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Placerville, CA, 0.8 miles from the town’s center, 150 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 Diamond Springs’ climate
What is the weather like in Diamond Springs?
A typical July afternoon reaches 94°, a January night drops to 37°. Milder January nights than 85% of U.S. towns; hotter July afternoons than 92% of U.S. towns.
How cold does it get in Diamond Springs in winter?
December nights average 37°. About 30 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 42°.
How hot does it get in Diamond Springs?
July, with a typical high of 94° and a low of 62°. About 74 days a year reach 90° and 12 reach 100° (Placerville, CA).
When is the first and last frost in Diamond Springs?
In half of years the last spring frost (32°) comes by March 31 and the first fall frost by November 21, about 237 frost-free days, at Placerville, CA.
What growing zone is Diamond Springs in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 25°.
What is the best time of year to visit Diamond Springs?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Diamond Springs getting warmer?
Yes: 1991–2020 averaged 0.8° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 88% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Diamond Springs.
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.