Newark, California climate: Normal weather by month, frost dates and records
Newark's normal year runs from 43°F January nights to 77°F August afternoons, with 14.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.5°C, January lows of 6°C, August highs of 25°C, 365 mm of precipitation a year.
- NOAA stationNewark
- Station IDUSC00046144
- Location37.51°N 122.03°W
- Elevation10 ft (3 m)
- From the centerunder 1 mile
- Population46,254
On October 23, the normal high in Newark is 72°F and the normal low 53°F, and the chance of measurable rain or snow is 12%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Newark.
- Jan 58° 43°
- Feb 61° 46°
- Mar 65° 48°
- Apr 67° 50°
- May 71° 53°
- Jun 75° 56°
- Jul 77° 58°
- Aug 77° 58°
- Sep 77° 58°
- Oct 73° 54°
- Nov 65° 47°
- Dec 58° 43°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Newark each month?
August is the warmest month, with normal highs of 77°F; January the coldest, with normal lows of 43°F. The most precipitation falls in February (2.82 in), the least in July (0.00 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 58°F | 43°F | 50.4°F | 2.77 | 11 | <1 | 1 | 9 h 50 min |
| February | 61°F | 46°F | 53.3°F | 2.82 | 9 | <1 | <1 | 10 h 50 min |
| March | 65°F | 48°F | 56.1°F | 2.17 | 9 | <1 | <1 | 11 h 50 min |
| April | 67°F | 50°F | 58.5°F | 1.07 | 6 | <1 | <1 | 13 h 10 min |
| May | 71°F | 53°F | 62.0°F | 0.47 | 3 | 1 | <1 | 14 h 10 min |
| June | 75°F | 56°F | 65.5°F | 0.17 | 1 | 2 | <1 | 14 h 40 min |
| July | 77°F | 58°F | 67.3°F | 0.00 | <1 | 2 | <1 | 14 h 30 min |
| August | 77°F | 58°F | 67.8°F | 0.02 | <1 | 2 | <1 | 13 h 40 min |
| September | 77°F | 58°F | 67.5°F | 0.09 | 1 | 3 | <1 | 12 h 30 min |
| October | 73°F | 54°F | 63.6°F | 0.65 | 3 | 1 | <1 | 11 h 20 min |
| November | 65°F | 47°F | 56.0°F | 1.38 | 7 | <1 | <1 | 10 h 10 min |
| December | 58°F | 43°F | 50.5°F | 2.76 | 10 | <1 | 1 | 9 h 40 min |
| Year (annual) | 69°F | 51°F | 59.9°F | 14.37 | 60 | 10 | 2 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 15°C | 6°C | 10.2°C | 70 mm |
| February | 16°C | 8°C | 11.8°C | 72 mm |
| March | 18°C | 9°C | 13.4°C | 55 mm |
| April | 19°C | 10°C | 14.7°C | 27 mm |
| May | 21°C | 12°C | 16.7°C | 12 mm |
| June | 24°C | 13°C | 18.6°C | 4 mm |
| July | 25°C | 14°C | 19.6°C | 0 mm |
| August | 25°C | 15°C | 19.9°C | 1 mm |
| September | 25°C | 14°C | 19.7°C | 2 mm |
| October | 23°C | 12°C | 17.6°C | 17 mm |
| November | 18°C | 8°C | 13.3°C | 35 mm |
| December | 15°C | 6°C | 10.3°C | 70 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00046144; 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.
When is the best weather to visit Newark?
Normal highs sit between 65°F and 85°F in April, May, June, July, August, September and October. Of those, July has the fewest days with rain (0).
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 USC00046144.
When is the last frost in Newark?
A night at 32°F or colder comes in only 43% of years in Newark (NOAA). NOAA's median date of the last spring frost is January 1 and of the first autumn frost December 27.
NOAA puts the median frost-free season at 365 days, and the season without a hard freeze (28°F) at 365 days.
The USDA's 2023 Plant Hardiness Zone Map puts Newark in zone 10a in ZIP code 94560. By the map's own method, the average of each year's coldest night over 1991-2020, Newark's NOAA station is in zone 10a: the coldest night of a typical year reaches 32°F (28 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 USC00046144; 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 in Newark?
In a normal year in Newark, 10 days a year reach 90°F, 2 nights fall to 32°F or colder and 60 days bring measurable precipitation.
- Days at 90°F or more
- 10a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 2a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 60a normal year
The highest temperature in this station's record (since 1942) is 107°F, on June 15, 1961; the lowest is 21°F, on December 22, 1990.
The wettest calendar year on that record is 1995, with 22.56 in.
Source: NOAA NCEI 1991-2020 annual normals, station USC00046144; records: ACIS (NOAA Regional Climate Centers), station USC00046144. Records use complete months only; a month missing more than three days is left out.
How sunny is Newark?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Newark, 4.7 kWh per square metre a day. June is the sunniest month (84%) and December the cloudiest (74%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 76% | 2.5 |
| February | 77% | 3.4 |
| March | 79% | 4.6 |
| April | 82% | 6.0 |
| May | 81% | 6.7 |
| June | 84% | 7.3 |
| July | 78% | 6.5 |
| August | 77% | 5.8 |
| September | 82% | 5.1 |
| October | 83% | 4.0 |
| November | 81% | 2.8 |
| December | 74% | 2.1 |
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 much heating and cooling does Newark need?
A normal year in Newark brings 2,288 heating degree days, 57% fewer than the median U.S. place (5,373), and 430 cooling degree days, 53% fewer than the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,744 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 451 | 0 |
| February | 326 | 0 |
| March | 278 | 2 |
| April | 205 | 9 |
| May | 123 | 30 |
| June | 48 | 65 |
| July | 16 | 88 |
| August | 12 | 97 |
| September | 21 | 95 |
| October | 86 | 43 |
| November | 270 | 2 |
| December | 450 | 0 |
| Year (annual) | 2,288 | 430 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00046144. 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.
Has Newark been warmer than normal lately?
Over 54 complete years from 1943 to 2020, the station's annual mean temperature rose at a fitted 3.0°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Newark's climate compare?
Newark is warmer than 93 of the other 218 places with their own NOAA record in California, and wetter than 98. Across the 7,247 U.S. stations with normals, its annual mean of 59.9°F is warmer than 75%.
In the Köppen classification computed from these normals, Newark is Csb: temperate, dry-summer, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Newark's climate
What is the coldest month in Newark?
January, with a normal high of 58°F and a normal low of 43°F. The warmest is August (77°F by day, 58°F at night).
Does it snow in Newark?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Newark?
February, with 2.82 in of precipitation in a normal year; the driest is July with 0.00 in.
What plant hardiness zone is Newark in?
The USDA's 2023 map puts Newark in zone 10a in ZIP code 94560. By the same method at Newark's NOAA station, the coldest night of a typical year reaches 32°F (28 years, 1991-2020): zone 10a.
Nearby and next
- California climateThe statewide normals and every place in the state
- Fremont, CA2 miles from this station, 59.5°F a year
- Sunnyvale, CA7 miles from this station, 59.9°F a year
- Palo Alto, CA7 miles from this station, 58.5°F a year
- Hayward, CA11 miles from this station, 59.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made