Mount Shasta weather in May: Mount Shasta, California: normal highs, lows, rain and records for May
Mount Shasta in May has a normal high of 69°F and a normal low of 41°F, a daily mean of 55°F, rising from 64°F on the 1st to 72°F by the 31st. Measurable precipitation falls on 8 days in a normal May, 2.10 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 5°C, 53 mm of precipitation in May.
- NOAA stationMount Shasta
- Station IDUSW00024215
- Location41.33°N 122.33°W
- Elevation3,535 ft (1,078 m)
- From the center1 miles
- Population3,124
- Jan 44° 29°
- Feb 47° 29°
- Mar 53° 32°
- Apr 59° 35°
- May 69° 41°
- Jun 76° 47°
- Jul 85° 52°
- Aug 85° 50°
- Sep 78° 45°
- Oct 65° 38°
- Nov 51° 31°
- Dec 42° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Mount Shasta in May?
The normal high is 69°F and the normal low 41°F, for a daily mean of 54.9°F. May is 8.0°F warmer than April and 6.7°F cooler than June. May is the 5th warmest month of the year in Mount Shasta and the 7th wettest. Across the month the normal high rises 8°F, from 64°F on May 1 to 72°F on May 31. From one year to the next May's mean temperature typically moves about 3.3°F either way (NOAA's standard deviation), so roughly two Mays in three average between 52°F and 58°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 29%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 64°F | 38°F | 29% | 15% |
| May 8 | 67°F | 39°F | 28% | 14% |
| May 15 | 69°F | 41°F | 27% | 14% |
| May 22 | 70°F | 43°F | 26% | 13% |
| May 31 | 72°F | 44°F | 23% | 11% |
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 | 64°F | 38°F | 29% | 15% | 14 h |
| May 2 | 65°F | 38°F | 29% | 15% | 14 h |
| May 3 | 65°F | 38°F | 29% | 15% | 14 h |
| May 4 | 66°F | 38°F | 29% | 14% | 14 h |
| May 5 | 66°F | 38°F | 28% | 14% | 14 h 10 min |
| May 6 | 66°F | 39°F | 28% | 14% | 14 h 10 min |
| May 7 | 67°F | 39°F | 28% | 14% | 14 h 10 min |
| May 8 | 67°F | 39°F | 28% | 14% | 14 h 10 min |
| May 9 | 67°F | 39°F | 28% | 14% | 14 h 20 min |
| May 10 | 67°F | 40°F | 27% | 14% | 14 h 20 min |
| May 11 | 68°F | 40°F | 27% | 14% | 14 h 20 min |
| May 12 | 68°F | 40°F | 27% | 14% | 14 h 20 min |
| May 13 | 68°F | 40°F | 27% | 14% | 14 h 20 min |
| May 14 | 69°F | 41°F | 27% | 14% | 14 h 30 min |
| May 15 | 69°F | 41°F | 27% | 14% | 14 h 30 min |
| May 16 | 69°F | 41°F | 27% | 14% | 14 h 30 min |
| May 17 | 69°F | 41°F | 27% | 14% | 14 h 30 min |
| May 18 | 70°F | 42°F | 27% | 14% | 14 h 30 min |
| May 19 | 70°F | 42°F | 27% | 14% | 14 h 40 min |
| May 20 | 70°F | 42°F | 27% | 13% | 14 h 40 min |
| May 21 | 70°F | 42°F | 26% | 13% | 14 h 40 min |
| May 22 | 70°F | 43°F | 26% | 13% | 14 h 40 min |
| May 23 | 71°F | 43°F | 26% | 13% | 14 h 40 min |
| May 24 | 71°F | 43°F | 25% | 13% | 14 h 40 min |
| May 25 | 71°F | 43°F | 25% | 13% | 14 h 50 min |
| May 26 | 71°F | 43°F | 25% | 12% | 14 h 50 min |
| May 27 | 71°F | 44°F | 24% | 12% | 14 h 50 min |
| May 28 | 71°F | 44°F | 24% | 12% | 14 h 50 min |
| May 29 | 72°F | 44°F | 23% | 12% | 14 h 50 min |
| May 30 | 72°F | 44°F | 23% | 12% | 14 h 50 min |
| May 31 | 72°F | 44°F | 23% | 11% | 15 h |
- Normal high
- 69°FMay average
- Normal low
- 41°FMay average
- Precipitation
- 2.10 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 2
- Daylight
- 14 h to 15 hMay 1 to May 31
- Days at 70°F or more
- 16
- Days at 80°F or more
- 6
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024215; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Mount Shasta in May?
On a given May day the chance of 0.01 inch or more is 27% on average, highest around May 1 (29%). In all, 2.10 in falls on 8 days of a normal May.
In a normal May in Mount Shasta, 1 days reach 90°F and 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024215.
How humid and windy is Mount Shasta in May?
At 3 p.m. the normal temperature is 71°F with 35% relative humidity and a dew point of 42°F; at 6 a.m. it is 49°F with 73% humidity. The wind averages 3.6 mph, most often from the northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 49°F | 41°F | 73% | 2.5 mph | – |
| 9 a.m. | 61°F | 43°F | 52% | 4.5 mph | – |
| noon | 69°F | 43°F | 40% | 4.7 mph | – |
| 3 p.m. | 71°F | 42°F | 35% | 4.7 mph | – |
| 6 p.m. | 66°F | 42°F | 41% | 4.2 mph | – |
| 9 p.m. | 57°F | 42°F | 56% | 3.7 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024215. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Mount Shasta?
The warmest May temperature on Mount Shasta's official record (since 1948) is 96°F, on May 30, 1986; the coldest is 21°F, on May 1, 1954. The wettest May brought 9.30 in (1990); the snowiest, 16.4 inches (1960).
The May mean against the 1991-2020 normal of 54.9°F: 2021 58.2°F (+3.3), 2022 53.6°F (−1.3), 2023 57.3°F (+2.4), 2024 57.0°F (+2.1), 2025 58.5°F (+3.6), 2026 58.7°F (+3.8). 5 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 58.2°F | +3.3°F | 0.65 in |
| 2022 | 53.6°F | −1.3°F | 0.54 in |
| 2023 | 57.3°F | +2.4°F | 1.78 in |
| 2024 | 57.0°F | +2.1°F | 1.39 in |
| 2025 | 58.5°F | +3.6°F | 0.50 in |
| 2026 | 58.7°F | +3.8°F | 2.36 in |
Source: records: ACIS, NWS threaded record MHSthr; recent months: ACIS, station USW00024215. Records and recent months use complete months only.
How does May in Mount Shasta 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; Mount Shasta's is 69°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.