Muscatine weather in May: Muscatine, Iowa: normal highs, lows, rain and records for May
Muscatine in May has a normal high of 74°F and a normal low of 51°F, a daily mean of 62°F, rising from 69°F on the 1st to 78°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 5.11 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 130 mm of precipitation in May.
- NOAA stationMuscatine
- Station IDUSC00135837
- Location41.41°N 91.07°W
- Elevation549 ft (167 m)
- From the centerunder 1 mile
- Population23,298
- Jan 31° 13°
- Feb 36° 17°
- Mar 50° 28°
- Apr 63° 39°
- May 74° 51°
- Jun 82° 61°
- Jul 85° 64°
- Aug 83° 62°
- Sep 78° 54°
- Oct 65° 42°
- Nov 49° 30°
- Dec 36° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Muscatine in May?
The normal high is 74°F and the normal low 51°F, for a daily mean of 62.3°F. May is 11.1°F warmer than April and 9.3°F cooler than June. May is the 5th warmest month of the year in Muscatine and the 2nd wettest. Across the month the normal high rises 9°F, from 69°F on May 1 to 78°F on May 31. From one year to the next May's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Mays in three average between 59°F and 65°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 43%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 69°F | 45°F | 41% | 26% |
| May 8 | 71°F | 48°F | 42% | 27% |
| May 15 | 73°F | 51°F | 43% | 27% |
| May 22 | 76°F | 53°F | 43% | 28% |
| May 31 | 78°F | 56°F | 43% | 29% |
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 | 69°F | 45°F | 41% | 26% | 14 h |
| May 2 | 69°F | 46°F | 41% | 26% | 14 h |
| May 3 | 69°F | 46°F | 41% | 26% | 14 h |
| May 4 | 70°F | 46°F | 42% | 27% | 14 h |
| May 5 | 70°F | 47°F | 42% | 27% | 14 h 10 min |
| May 6 | 70°F | 47°F | 42% | 27% | 14 h 10 min |
| May 7 | 71°F | 48°F | 42% | 27% | 14 h 10 min |
| May 8 | 71°F | 48°F | 42% | 27% | 14 h 10 min |
| May 9 | 71°F | 48°F | 42% | 27% | 14 h 20 min |
| May 10 | 72°F | 49°F | 42% | 27% | 14 h 20 min |
| May 11 | 72°F | 49°F | 42% | 27% | 14 h 20 min |
| May 12 | 72°F | 49°F | 43% | 27% | 14 h 20 min |
| May 13 | 73°F | 50°F | 43% | 27% | 14 h 20 min |
| May 14 | 73°F | 50°F | 43% | 27% | 14 h 30 min |
| May 15 | 73°F | 51°F | 43% | 27% | 14 h 30 min |
| May 16 | 74°F | 51°F | 43% | 27% | 14 h 30 min |
| May 17 | 74°F | 51°F | 43% | 27% | 14 h 30 min |
| May 18 | 74°F | 52°F | 43% | 27% | 14 h 30 min |
| May 19 | 75°F | 52°F | 43% | 28% | 14 h 40 min |
| May 20 | 75°F | 52°F | 43% | 28% | 14 h 40 min |
| May 21 | 75°F | 53°F | 43% | 28% | 14 h 40 min |
| May 22 | 76°F | 53°F | 43% | 28% | 14 h 40 min |
| May 23 | 76°F | 54°F | 43% | 28% | 14 h 40 min |
| May 24 | 76°F | 54°F | 43% | 28% | 14 h 50 min |
| May 25 | 77°F | 54°F | 43% | 28% | 14 h 50 min |
| May 26 | 77°F | 55°F | 43% | 28% | 14 h 50 min |
| May 27 | 77°F | 55°F | 43% | 28% | 14 h 50 min |
| May 28 | 77°F | 55°F | 43% | 28% | 14 h 50 min |
| May 29 | 78°F | 56°F | 43% | 29% | 14 h 50 min |
| May 30 | 78°F | 56°F | 43% | 29% | 14 h 50 min |
| May 31 | 78°F | 56°F | 43% | 29% | 15 h |
- Normal high
- 74°FMay average
- Normal low
- 51°FMay average
- Precipitation
- 5.11 inmonth total
- Days with precipitation
- 130.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 14 h to 15 hMay 1 to May 31
- Days at 70°F or more
- 21
- Days at 80°F or more
- 10
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00135837; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Muscatine in May?
On a given May day the chance of 0.01 inch or more is 43% on average, highest around May 26 (43%). In all, 5.11 in falls on 13 days of a normal May, 1 of them with an inch or more.
In a normal May in Muscatine, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00135837.
What are the records for May in Muscatine?
The warmest May temperature on this station's record (since 1935) is 96°F, on May 28, 2018; the coldest is 26°F, on May 9, 1945. The wettest May brought 11.09 in (1996).
The May mean against the 1991-2020 normal of 62.3°F: 2021 60.5°F (−1.8), 2023 64.3°F (+2.0), 2024 65.2°F (+2.9), 2025 61.2°F (−1.1). 2 of 4 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.5°F | −1.8°F | 5.68 in |
| 2023 | 64.3°F | +2.0°F | 1.99 in |
| 2024 | 65.2°F | +2.9°F | 3.94 in |
| 2025 | 61.2°F | −1.1°F | 4.43 in |
Source: records: ACIS, station USC00135837; recent months: ACIS, station USC00135837. Records and recent months use complete months only.
How does May in Muscatine compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, May normal highs run from 66°F in Northwood to 74°F in Glenwood; Muscatine's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.