St. Peters weather in May: St. Peters, Missouri: normal highs, lows, rain and records for May
St. Peters in May has a normal high of 76°F and a normal low of 54°F, a daily mean of 65°F, rising from 73°F on the 1st to 80°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 4.80 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 12°C, 122 mm of precipitation in May.
- NOAA stationSt Peters (2 mi SE)
- Station IDUSC00237475
- Location38.77°N 90.59°W
- Elevation575 ft (175 m)
- From the center1 miles
- Population61,398
- Jan 39° 21°
- Feb 45° 25°
- Mar 56° 33°
- Apr 67° 43°
- May 76° 54°
- Jun 84° 63°
- Jul 88° 68°
- Aug 87° 65°
- Sep 81° 57°
- Oct 69° 45°
- Nov 55° 35°
- Dec 44° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is St. Peters in May?
The normal high is 76°F and the normal low 54°F, for a daily mean of 64.9°F. May is 9.6°F warmer than April and 9.0°F cooler than June. May is the 5th warmest month of the year in St. Peters and the wettest. Across the month the normal high rises 7°F, from 73°F on May 1 to 80°F on May 31. From one year to the next May's mean temperature typically moves about 2.9°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 42%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 73°F | 49°F | 41% | 26% |
| May 8 | 74°F | 51°F | 42% | 26% |
| May 15 | 76°F | 53°F | 41% | 27% |
| May 22 | 78°F | 55°F | 40% | 26% |
| May 31 | 80°F | 59°F | 38% | 25% |
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 | 73°F | 49°F | 41% | 26% | 13 h 50 min |
| May 2 | 73°F | 49°F | 41% | 26% | 13 h 50 min |
| May 3 | 73°F | 49°F | 41% | 26% | 13 h 50 min |
| May 4 | 73°F | 50°F | 41% | 26% | 13 h 50 min |
| May 5 | 74°F | 50°F | 41% | 26% | 14 h |
| May 6 | 74°F | 50°F | 41% | 26% | 14 h |
| May 7 | 74°F | 51°F | 41% | 26% | 14 h |
| May 8 | 74°F | 51°F | 42% | 26% | 14 h |
| May 9 | 75°F | 51°F | 42% | 26% | 14 h |
| May 10 | 75°F | 52°F | 42% | 26% | 14 h 10 min |
| May 11 | 75°F | 52°F | 42% | 27% | 14 h 10 min |
| May 12 | 75°F | 52°F | 41% | 27% | 14 h 10 min |
| May 13 | 76°F | 53°F | 41% | 27% | 14 h 10 min |
| May 14 | 76°F | 53°F | 41% | 27% | 14 h 10 min |
| May 15 | 76°F | 53°F | 41% | 27% | 14 h 20 min |
| May 16 | 76°F | 54°F | 41% | 27% | 14 h 20 min |
| May 17 | 77°F | 54°F | 41% | 27% | 14 h 20 min |
| May 18 | 77°F | 54°F | 41% | 26% | 14 h 20 min |
| May 19 | 77°F | 54°F | 40% | 26% | 14 h 20 min |
| May 20 | 77°F | 55°F | 40% | 26% | 14 h 20 min |
| May 21 | 78°F | 55°F | 40% | 26% | 14 h 30 min |
| May 22 | 78°F | 55°F | 40% | 26% | 14 h 30 min |
| May 23 | 78°F | 56°F | 39% | 26% | 14 h 30 min |
| May 24 | 78°F | 56°F | 39% | 26% | 14 h 30 min |
| May 25 | 79°F | 56°F | 39% | 26% | 14 h 30 min |
| May 26 | 79°F | 57°F | 39% | 26% | 14 h 30 min |
| May 27 | 79°F | 57°F | 39% | 26% | 14 h 30 min |
| May 28 | 79°F | 57°F | 39% | 26% | 14 h 40 min |
| May 29 | 80°F | 58°F | 38% | 26% | 14 h 40 min |
| May 30 | 80°F | 58°F | 38% | 25% | 14 h 40 min |
| May 31 | 80°F | 59°F | 38% | 25% | 14 h 40 min |
- Normal high
- 76°FMay average
- Normal low
- 54°FMay average
- Precipitation
- 4.80 inmonth total
- Days with precipitation
- 130.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 50 min to 14 h 40 minMay 1 to May 31
- Days at 70°F or more
- 24
- Days at 80°F or more
- 14
- Sunshine
- 74%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00237475; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in St. Peters in May?
On a given May day the chance of 0.01 inch or more is 40% on average, highest around May 8 (42%). In all, 4.80 in falls on 13 days of a normal May, 1 of them with an inch or more.
In a normal May in St. Peters, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00237475.
How does May in St. Peters compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, May normal highs run from 71°F in Green City to 81°F in Malden; St. Peters's is 76°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.