Apex weather in May: Apex, North Carolina: normal highs, lows, rain and records for May
Apex in May has a normal high of 79°F and a normal low of 57°F, a daily mean of 68°F, rising from 76°F on the 1st to 82°F by the 31st. Measurable precipitation falls on 10 days in a normal May, 3.83 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 14°C, 97 mm of precipitation in May.
- NOAA stationApex
- Station IDUSC00310212
- Location35.74°N 78.84°W
- Elevation450 ft (137 m)
- From the center3 miles
- Population75,977
- Jan 51° 31°
- Feb 54° 33°
- Mar 62° 39°
- Apr 72° 48°
- May 79° 57°
- Jun 86° 65°
- Jul 89° 69°
- Aug 87° 68°
- Sep 82° 62°
- Oct 72° 50°
- Nov 62° 40°
- Dec 54° 34°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Apex in May?
The normal high is 79°F and the normal low 57°F, for a daily mean of 67.7°F. May is 8.1°F warmer than April and 7.7°F cooler than June. May is the 5th warmest month of the year in Apex and the 6th wettest. Across the month the normal high rises 6°F, from 76°F on May 1 to 82°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 65°F and 71°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 76°F | 52°F | 33% | 21% |
| May 8 | 77°F | 54°F | 34% | 21% |
| May 15 | 78°F | 56°F | 34% | 22% |
| May 22 | 80°F | 59°F | 35% | 22% |
| May 31 | 82°F | 61°F | 35% | 23% |
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 | 76°F | 52°F | 33% | 21% | 13 h 40 min |
| May 2 | 76°F | 52°F | 33% | 21% | 13 h 40 min |
| May 3 | 76°F | 53°F | 33% | 21% | 13 h 40 min |
| May 4 | 76°F | 53°F | 33% | 21% | 13 h 40 min |
| May 5 | 76°F | 53°F | 33% | 21% | 13 h 40 min |
| May 6 | 77°F | 54°F | 34% | 21% | 13 h 50 min |
| May 7 | 77°F | 54°F | 34% | 21% | 13 h 50 min |
| May 8 | 77°F | 54°F | 34% | 21% | 13 h 50 min |
| May 9 | 77°F | 55°F | 34% | 21% | 13 h 50 min |
| May 10 | 77°F | 55°F | 34% | 21% | 13 h 50 min |
| May 11 | 78°F | 55°F | 34% | 21% | 13 h 50 min |
| May 12 | 78°F | 56°F | 34% | 21% | 14 h |
| May 13 | 78°F | 56°F | 34% | 21% | 14 h |
| May 14 | 78°F | 56°F | 34% | 21% | 14 h |
| May 15 | 78°F | 56°F | 34% | 22% | 14 h |
| May 16 | 79°F | 57°F | 34% | 22% | 14 h |
| May 17 | 79°F | 57°F | 34% | 22% | 14 h |
| May 18 | 79°F | 57°F | 35% | 22% | 14 h 10 min |
| May 19 | 79°F | 58°F | 35% | 22% | 14 h 10 min |
| May 20 | 80°F | 58°F | 35% | 22% | 14 h 10 min |
| May 21 | 80°F | 58°F | 35% | 22% | 14 h 10 min |
| May 22 | 80°F | 59°F | 35% | 22% | 14 h 10 min |
| May 23 | 80°F | 59°F | 35% | 22% | 14 h 10 min |
| May 24 | 80°F | 59°F | 35% | 22% | 14 h 10 min |
| May 25 | 81°F | 59°F | 35% | 22% | 14 h 20 min |
| May 26 | 81°F | 60°F | 35% | 22% | 14 h 20 min |
| May 27 | 81°F | 60°F | 35% | 22% | 14 h 20 min |
| May 28 | 81°F | 60°F | 35% | 22% | 14 h 20 min |
| May 29 | 82°F | 61°F | 35% | 22% | 14 h 20 min |
| May 30 | 82°F | 61°F | 35% | 23% | 14 h 20 min |
| May 31 | 82°F | 61°F | 35% | 23% | 14 h 20 min |
- Normal high
- 79°FMay average
- Normal low
- 57°FMay average
- Precipitation
- 3.83 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 40 min to 14 h 20 minMay 1 to May 31
- Days at 70°F or more
- 26
- Days at 80°F or more
- 16
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00310212; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Apex in May?
On a given May day the chance of 0.01 inch or more is 34% on average, highest around May 31 (35%). In all, 3.83 in falls on 10 days of a normal May, 1 of them with an inch or more.
In a normal May in Apex, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00310212.
What are the records for May in Apex?
The May mean against the 1991-2020 normal of 67.7°F: 2021 66.8°F (−0.9), 2022 69.1°F (+1.4), 2023 65.3°F (−2.4), 2024 70.9°F (+3.2), 2025 69.5°F (+1.8). 3 of 5 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 66.8°F | −0.9°F | 2.43 in |
| 2022 | 69.1°F | +1.4°F | 6.19 in |
| 2023 | 65.3°F | −2.4°F | 3.47 in |
| 2024 | 70.9°F | +3.2°F | 4.88 in |
| 2025 | 69.5°F | +1.8°F | 5.25 in |
Source: recent months: ACIS, station USC00310212. Records and recent months use complete months only.
How does May in Apex compare across North Carolina?
Across the 131 places PlainClimate covers in North Carolina, May normal highs run from 61°F in Beech Mountain to 83°F in Laurinburg; Apex's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.