Fairfield weather in May: Fairfield, California: normal highs, lows, rain and records for May
Fairfield in May has a normal high of 78°F and a normal low of 52°F, a daily mean of 65°F, rising from 75°F on the 1st to 81°F by the 31st. Measurable precipitation falls on 3 days in a normal May, 0.74 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 11°C, 19 mm of precipitation in May.
- NOAA stationFairfield
- Station IDUSC00042934
- Location38.27°N 122.07°W
- Elevation40 ft (12 m)
- Population122,646
- Jan 57° 40°
- Feb 62° 43°
- Mar 66° 45°
- Apr 71° 48°
- May 78° 52°
- Jun 85° 56°
- Jul 90° 58°
- Aug 89° 58°
- Sep 87° 57°
- Oct 78° 52°
- Nov 66° 45°
- Dec 57° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Fairfield in May?
The normal high is 78°F and the normal low 52°F, for a daily mean of 65.0°F. May is 5.4°F warmer than April and 5.8°F cooler than June. May is the 6th warmest month of the year in Fairfield and the 8th wettest. Across the month the normal high rises 6°F, from 75°F on May 1 to 81°F on May 31. From one year to the next May's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Mays in three average between 62°F and 68°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 14%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 75°F | 50°F | 14% | 8% |
| May 8 | 76°F | 51°F | 12% | 7% |
| May 15 | 78°F | 52°F | 10% | 6% |
| May 22 | 79°F | 53°F | 9% | 5% |
| May 31 | 81°F | 54°F | 6% | 3% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 75°F | 50°F | 14% | 8% | 13 h 50 min |
| May 2 | 75°F | 50°F | 14% | 8% | 13 h 50 min |
| May 3 | 75°F | 50°F | 13% | 8% | 13 h 50 min |
| May 4 | 75°F | 50°F | 13% | 8% | 13 h 50 min |
| May 5 | 75°F | 51°F | 13% | 8% | 13 h 50 min |
| May 6 | 76°F | 51°F | 13% | 8% | 14 h |
| May 7 | 76°F | 51°F | 12% | 7% | 14 h |
| May 8 | 76°F | 51°F | 12% | 7% | 14 h |
| May 9 | 76°F | 51°F | 12% | 7% | 14 h |
| May 10 | 77°F | 51°F | 12% | 7% | 14 h |
| May 11 | 77°F | 51°F | 11% | 7% | 14 h 10 min |
| May 12 | 77°F | 52°F | 11% | 7% | 14 h 10 min |
| May 13 | 77°F | 52°F | 11% | 6% | 14 h 10 min |
| May 14 | 77°F | 52°F | 11% | 6% | 14 h 10 min |
| May 15 | 78°F | 52°F | 10% | 6% | 14 h 10 min |
| May 16 | 78°F | 52°F | 10% | 6% | 14 h 10 min |
| May 17 | 78°F | 52°F | 10% | 6% | 14 h 20 min |
| May 18 | 78°F | 53°F | 10% | 6% | 14 h 20 min |
| May 19 | 78°F | 53°F | 9% | 5% | 14 h 20 min |
| May 20 | 79°F | 53°F | 9% | 5% | 14 h 20 min |
| May 21 | 79°F | 53°F | 9% | 5% | 14 h 20 min |
| May 22 | 79°F | 53°F | 9% | 5% | 14 h 20 min |
| May 23 | 79°F | 53°F | 8% | 5% | 14 h 30 min |
| May 24 | 80°F | 53°F | 8% | 5% | 14 h 30 min |
| May 25 | 80°F | 54°F | 8% | 4% | 14 h 30 min |
| May 26 | 80°F | 54°F | 7% | 4% | 14 h 30 min |
| May 27 | 80°F | 54°F | 7% | 4% | 14 h 30 min |
| May 28 | 81°F | 54°F | 7% | 4% | 14 h 30 min |
| May 29 | 81°F | 54°F | 6% | 4% | 14 h 30 min |
| May 30 | 81°F | 54°F | 6% | 4% | 14 h 40 min |
| May 31 | 81°F | 54°F | 6% | 3% | 14 h 40 min |
- Normal high
- 78°FMay average
- Normal low
- 52°FMay average
- Precipitation
- 0.74 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 13 h 50 min to 14 h 40 minMay 1 to May 31
- Days at 70°F or more
- 26
- Days at 80°F or more
- 12
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00042934; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Fairfield in May?
On a given May day the chance of 0.01 inch or more is 10% on average, highest around May 1 (14%). In all, 0.74 in falls on 3 days of a normal May.
In a normal May in Fairfield, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00042934.
What are the records for May in Fairfield?
The warmest May temperature on this station's record (since 1950) is 111°F, on May 29, 1984; the coldest is 35°F, on May 7, 1970. The wettest May brought 3.29 in (1998).
The May mean against the 1991-2020 normal of 65.0°F: 2021 67.5°F (+2.5), 2022 66.4°F (+1.4), 2023 62.3°F (−2.7), 2024 67.1°F (+2.1), 2025 67.8°F (+2.8), 2026 66.8°F (+1.8). 5 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.5°F | +2.5°F | 0.00 in |
| 2022 | 66.4°F | +1.4°F | 0.00 in |
| 2023 | 62.3°F | −2.7°F | – |
| 2024 | 67.1°F | +2.1°F | 0.56 in |
| 2025 | 67.8°F | +2.8°F | 0.23 in |
| 2026 | 66.8°F | +1.8°F | 0.89 in |
Source: records: ACIS, station USC00042934; recent months: ACIS, station USC00042934. Records and recent months use complete months only.
How does May in Fairfield compare across California?
Across the 219 places PlainClimate covers in California, May normal highs run from 58°F in Tahoma to 96°F in Needles; Fairfield's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.