Nampa weather in May: Nampa, Idaho: normal highs, lows, rain and records for May
Nampa in May has a normal high of 74°F and a normal low of 44°F, a daily mean of 59°F, rising from 69°F on the 1st to 78°F by the 31st. Measurable precipitation falls on 8 days in a normal May, 1.37 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 7°C, 35 mm of precipitation in May.
- NOAA stationNampa Sugar Factory
- Station IDUSC00106305
- Location43.60°N 116.58°W
- Elevation2,470 ft (753 m)
- Population117,350
- Jan 40° 23°
- Feb 47° 26°
- Mar 57° 32°
- Apr 65° 36°
- May 74° 44°
- Jun 83° 51°
- Jul 93° 57°
- Aug 92° 56°
- Sep 81° 47°
- Oct 67° 37°
- Nov 51° 28°
- Dec 40° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Nampa in May?
The normal high is 74°F and the normal low 44°F, for a daily mean of 58.9°F. May is 8.6°F warmer than April and 8.0°F cooler than June. May is the 5th warmest month of the year in Nampa 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 2.5°F either way (NOAA's standard deviation), so roughly two Mays in three average between 56°F and 61°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 28%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 69°F | 39°F | 28% | 13% |
| May 8 | 72°F | 42°F | 27% | 13% |
| May 15 | 74°F | 44°F | 26% | 13% |
| May 22 | 76°F | 46°F | 26% | 12% |
| May 31 | 78°F | 48°F | 24% | 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 | 69°F | 39°F | 28% | 13% | 14 h 10 min |
| May 2 | 70°F | 40°F | 27% | 13% | 14 h 10 min |
| May 3 | 70°F | 40°F | 27% | 13% | 14 h 10 min |
| May 4 | 70°F | 40°F | 27% | 13% | 14 h 10 min |
| May 5 | 71°F | 41°F | 27% | 13% | 14 h 20 min |
| May 6 | 71°F | 41°F | 27% | 13% | 14 h 20 min |
| May 7 | 71°F | 41°F | 27% | 13% | 14 h 20 min |
| May 8 | 72°F | 42°F | 27% | 13% | 14 h 20 min |
| May 9 | 72°F | 42°F | 27% | 13% | 14 h 30 min |
| May 10 | 72°F | 42°F | 27% | 13% | 14 h 30 min |
| May 11 | 73°F | 43°F | 27% | 13% | 14 h 30 min |
| May 12 | 73°F | 43°F | 26% | 13% | 14 h 30 min |
| May 13 | 73°F | 43°F | 26% | 13% | 14 h 40 min |
| May 14 | 74°F | 44°F | 26% | 13% | 14 h 40 min |
| May 15 | 74°F | 44°F | 26% | 13% | 14 h 40 min |
| May 16 | 74°F | 44°F | 26% | 13% | 14 h 40 min |
| May 17 | 74°F | 45°F | 26% | 13% | 14 h 40 min |
| May 18 | 75°F | 45°F | 26% | 13% | 14 h 50 min |
| May 19 | 75°F | 45°F | 26% | 13% | 14 h 50 min |
| May 20 | 75°F | 45°F | 26% | 13% | 14 h 50 min |
| May 21 | 76°F | 46°F | 26% | 13% | 14 h 50 min |
| May 22 | 76°F | 46°F | 26% | 12% | 14 h 50 min |
| May 23 | 76°F | 46°F | 26% | 12% | 15 h |
| May 24 | 76°F | 47°F | 25% | 12% | 15 h |
| May 25 | 77°F | 47°F | 25% | 12% | 15 h |
| May 26 | 77°F | 47°F | 25% | 12% | 15 h |
| May 27 | 77°F | 47°F | 25% | 12% | 15 h |
| May 28 | 77°F | 47°F | 25% | 11% | 15 h 10 min |
| May 29 | 78°F | 48°F | 25% | 11% | 15 h 10 min |
| May 30 | 78°F | 48°F | 24% | 11% | 15 h 10 min |
| May 31 | 78°F | 48°F | 24% | 11% | 15 h 10 min |
- Normal high
- 74°FMay average
- Normal low
- 44°FMay average
- Precipitation
- 1.37 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 2
- Nights at 32°F or colder
- 1
- Daylight
- 14 h 10 min to 15 h 10 minMay 1 to May 31
- Days at 70°F or more
- 20
- Days at 80°F or more
- 9
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00106305; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Nampa in May?
On a given May day the chance of 0.01 inch or more is 26% on average, highest around May 1 (28%). In all, 1.37 in falls on 8 days of a normal May.
In a normal May in Nampa, 2 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00106305.
What are the records for May in Nampa?
The warmest May temperature on this station's record (since 1976) is 100°F, on May 31, 1986; the coldest is 26°F, on May 3, 2001. The wettest May brought 4.00 in (1998).
Source: records: ACIS, station USC00106305. Records and recent months use complete months only.
How does May in Nampa compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, May normal highs run from 50°F in Mullan to 79°F in Glenns Ferry; Nampa's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.