Lake Solano, California climate: Climate normals at a NOAA weather station
Lake Solano's normal year runs from 38°F January nights to 97°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.2°C, January lows of 3°C, July highs of 36°C.
- NOAA stationLake Solano
- Station IDUSC00044712
- Location38.49°N 122.00°W
- Elevation187 ft (57 m)
On October 23, the normal high in Lake Solano is 77°F and the normal low 49°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Lake Solano.
- Jan 57° 38°
- Feb 62° 41°
- Mar 68° 44°
- Apr 73° 48°
- May 82° 53°
- Jun 91° 58°
- Jul 97° 60°
- Aug 96° 58°
- Sep 91° 56°
- Oct 80° 50°
- Nov 66° 43°
- Dec 57° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Lake Solano each month?
July is the warmest month, with normal highs of 97°F; January the coldest, with normal lows of 38°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 57°F | 38°F | 47.6°F | – | <1 | 5 | 9 h 50 min |
| February | 62°F | 41°F | 51.6°F | – | <1 | 2 | 10 h 40 min |
| March | 68°F | 44°F | 55.9°F | – | <1 | <1 | 11 h 50 min |
| April | 73°F | 48°F | 60.5°F | – | 1 | <1 | 13 h 10 min |
| May | 82°F | 53°F | 67.4°F | – | 7 | <1 | 14 h 10 min |
| June | 91°F | 58°F | 74.4°F | – | 18 | <1 | 14 h 50 min |
| July | 97°F | 60°F | 78.5°F | – | 28 | <1 | 14 h 40 min |
| August | 96°F | 58°F | 77.0°F | – | 27 | <1 | 13 h 40 min |
| September | 91°F | 56°F | 73.6°F | – | 19 | <1 | 12 h 30 min |
| October | 80°F | 50°F | 65.2°F | – | 4 | <1 | 11 h 20 min |
| November | 66°F | 43°F | 54.7°F | – | <1 | 1 | 10 h 10 min |
| December | 57°F | 38°F | 47.8°F | – | <1 | 6 | 9 h 30 min |
| Year (annual) | 77°F | 49°F | 62.9°F | – | 104 | 14 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 14°C | 3°C | 8.7°C |
| February | 17°C | 5°C | 10.9°C |
| March | 20°C | 7°C | 13.3°C |
| April | 23°C | 9°C | 15.8°C |
| May | 28°C | 12°C | 19.7°C |
| June | 33°C | 15°C | 23.6°C |
| July | 36°C | 15°C | 25.8°C |
| August | 36°C | 15°C | 25.0°C |
| September | 33°C | 13°C | 23.1°C |
| October | 27°C | 10°C | 18.4°C |
| November | 19°C | 6°C | 12.6°C |
| December | 14°C | 4°C | 8.8°C |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00044712; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Lake Solano?
Normal highs sit between 65°F and 85°F in March, April, May, October and November.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00044712.
When is the last frost at Lake Solano?
In Lake Solano, the last spring frost (32°F) comes after February 4 in half of years and after March 9 in one year in ten; the first autumn frost comes before December 5 in half of years and before November 18 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- February 41 year in 10 after March 9; 9 in 10 after January 2
- First autumn frost, half of years before
- December 51 year in 10 before November 18; 9 in 10 before January 2
NOAA puts the median frost-free season at 304 days, and the season without a hard freeze (28°F) at 351 days.
A hard freeze (28°F) comes after January 8 in half of springs and before December 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Lake Solano in zone 9b in ZIP code 95688, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 9b: the coldest night of a typical year reaches 26°F (30 complete years).
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00044712; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Lake Solano?
In a normal year in Lake Solano, 104 days a year reach 90°F (30 of them 100°F or more) and 14 nights fall to 32°F or colder.
- Days at 90°F or more
- 104a normal year
- Days at 100°F or more
- 30a normal year
- Nights at 32°F or colder
- 14a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
The highest temperature in this station's record (since 1975) is 117°F, on July 12, 2021; the lowest is 12°F, on December 22, 1990.
The wettest calendar year on that record is 1983, with 50.03 in.
Source: NOAA NCEI 1991-2020 annual normals, station USC00044712; records: ACIS (NOAA Regional Climate Centers), station USC00044712. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Lake Solano?
Over a year 87% of the sunlight that would reach the ground under clear skies gets through the clouds at Lake Solano, 5.1 kWh per square metre a day. July is the sunniest month (95%) and December the cloudiest (72%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 74% | 2.3 |
| February | 77% | 3.3 |
| March | 78% | 4.6 |
| April | 84% | 6.1 |
| May | 88% | 7.3 |
| June | 93% | 8.1 |
| July | 95% | 8.0 |
| August | 94% | 7.1 |
| September | 93% | 5.8 |
| October | 88% | 4.2 |
| November | 81% | 2.8 |
| December | 72% | 2.0 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Lake Solano record?
A normal year at Lake Solano brings 2,357 heating degree days, 56% fewer than the median U.S. place (5,373), and 1,596 cooling degree days, 76% more than the median (908). Four months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,989 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 541 | 0 |
| February | 375 | 0 |
| March | 286 | 4 |
| April | 164 | 29 |
| May | 58 | 133 |
| June | 8 | 292 |
| July | 0 | 419 |
| August | 0 | 372 |
| September | 5 | 264 |
| October | 75 | 81 |
| November | 312 | 3 |
| December | 533 | 0 |
| Year (annual) | 2,357 | 1,596 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00044712. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Lake Solano been warmer than normal?
2025 averaged 63.9°F, 1.0°F above the 1991-2020 normal of 62.9°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 64.4°F | +1.5°F |
| 2022 | 64.6°F | +1.7°F |
| 2023 | 63.0°F | +0.1°F |
| 2024 | 65.3°F | +2.4°F |
| 2025 | 63.9°F | +1.0°F |
Over 37 complete years from 1976 to 2025, the station's annual mean temperature rose at a fitted 5.7°F per century (+0.32°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00044712; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Lake Solano's climate compare?
Lake Solano is warmer than 144 of the 219 places with their own NOAA record in California. Across the 7,247 U.S. stations with normals, its annual mean of 62.9°F is warmer than 82%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Lake Solano share this climate record?
Allendale has no NOAA station with 1991-2020 normals of its own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Allendale, CA1,915 people · 4 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Lake Solano's climate
What is the coldest month at Lake Solano?
January, with a normal high of 57°F and a normal low of 38°F. The warmest is July (97°F by day, 60°F at night).
What plant hardiness zone is Lake Solano in?
The USDA's 2023 map puts Lake Solano in zone 9b in ZIP code 95688, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 26°F (30 years, 1991-2020): zone 9b.
How late can frost come at Lake Solano?
In half of years the last 32°F night comes after February 4; in one year in ten it comes after March 9. Waiting until March 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- California climateThe statewide normals and every place in the state
- Winters, CA2 miles from this station, 62.6°F a year
- Markley Cove, CA6 miles from this station, 60.7°F a year
- Vacaville, CA8 miles from this station, 62.1°F a year
- Davis, CA12 miles from this station, 61.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made