West Chicago weather in May: West Chicago, Illinois: normal highs, lows, rain and records for May
West Chicago in May has a normal high of 71°F and a normal low of 49°F, a daily mean of 60°F, rising from 65°F on the 1st to 76°F by the 31st. Measurable precipitation falls on 14 days in a normal May, 4.34 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 9°C, 110 mm of precipitation in May.
- NOAA stationWest Chicago Dupage Airport
- Station IDUSW00094892
- Location41.91°N 88.25°W
- Elevation754 ft (230 m)
- From the center2 miles
- Population25,469
- Jan 31° 16°
- Feb 35° 19°
- Mar 47° 28°
- Apr 60° 38°
- May 71° 49°
- Jun 81° 59°
- Jul 84° 63°
- Aug 82° 62°
- Sep 76° 54°
- Oct 62° 42°
- Nov 48° 31°
- Dec 35° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is West Chicago in May?
The normal high is 71°F and the normal low 49°F, for a daily mean of 59.8°F. May is 11.0°F warmer than April and 9.9°F cooler than June. May is the 5th warmest month of the year in West Chicago and the wettest. Across the month the normal high rises 11°F, from 65°F on May 1 to 76°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 57°F and 63°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 44%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 65°F | 43°F | 42% | 27% |
| May 8 | 68°F | 46°F | 44% | 28% |
| May 15 | 71°F | 48°F | 44% | 27% |
| May 22 | 73°F | 51°F | 43% | 27% |
| May 31 | 76°F | 54°F | 42% | 27% |
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 | 65°F | 43°F | 42% | 27% | 14 h |
| May 2 | 66°F | 44°F | 43% | 27% | 14 h |
| May 3 | 66°F | 44°F | 43% | 27% | 14 h |
| May 4 | 67°F | 44°F | 43% | 27% | 14 h 10 min |
| May 5 | 67°F | 45°F | 43% | 27% | 14 h 10 min |
| May 6 | 67°F | 45°F | 43% | 27% | 14 h 10 min |
| May 7 | 68°F | 45°F | 44% | 27% | 14 h 10 min |
| May 8 | 68°F | 46°F | 44% | 28% | 14 h 20 min |
| May 9 | 68°F | 46°F | 44% | 28% | 14 h 20 min |
| May 10 | 69°F | 47°F | 44% | 28% | 14 h 20 min |
| May 11 | 69°F | 47°F | 44% | 28% | 14 h 20 min |
| May 12 | 70°F | 47°F | 44% | 28% | 14 h 20 min |
| May 13 | 70°F | 48°F | 44% | 28% | 14 h 30 min |
| May 14 | 70°F | 48°F | 44% | 28% | 14 h 30 min |
| May 15 | 71°F | 48°F | 44% | 27% | 14 h 30 min |
| May 16 | 71°F | 49°F | 43% | 27% | 14 h 30 min |
| May 17 | 71°F | 49°F | 43% | 27% | 14 h 40 min |
| May 18 | 72°F | 49°F | 43% | 27% | 14 h 40 min |
| May 19 | 72°F | 50°F | 43% | 27% | 14 h 40 min |
| May 20 | 72°F | 50°F | 43% | 27% | 14 h 40 min |
| May 21 | 73°F | 51°F | 43% | 27% | 14 h 40 min |
| May 22 | 73°F | 51°F | 43% | 27% | 14 h 40 min |
| May 23 | 74°F | 51°F | 43% | 27% | 14 h 50 min |
| May 24 | 74°F | 52°F | 43% | 27% | 14 h 50 min |
| May 25 | 74°F | 52°F | 43% | 27% | 14 h 50 min |
| May 26 | 75°F | 52°F | 43% | 27% | 14 h 50 min |
| May 27 | 75°F | 53°F | 42% | 27% | 14 h 50 min |
| May 28 | 75°F | 53°F | 42% | 27% | 14 h 50 min |
| May 29 | 76°F | 54°F | 42% | 27% | 15 h |
| May 30 | 76°F | 54°F | 42% | 27% | 15 h |
| May 31 | 76°F | 54°F | 42% | 27% | 15 h |
- Normal high
- 71°FMay average
- Normal low
- 49°FMay average
- Precipitation
- 4.34 inmonth total
- Days with precipitation
- 140.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 1
- Daylight
- 14 h to 15 hMay 1 to May 31
- Days at 70°F or more
- 17
- Days at 80°F or more
- 8
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094892; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in West Chicago in May?
On a given May day the chance of 0.01 inch or more is 43% on average, highest around May 10 (44%). In all, 4.34 in falls on 14 days of a normal May, 1 of them with an inch or more.
In a normal May in West Chicago, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094892.
How humid and windy is West Chicago in May?
At 3 p.m. the normal temperature is 73°F with 51% relative humidity and a dew point of 54°F; at 6 a.m. it is 59°F with 82% humidity. The wind averages 9.0 mph, most often from the south-southeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 59°F | 54°F | 82% | 7.3 mph | 65% |
| 9 a.m. | 67°F | 55°F | 64% | 10.2 mph | 63% |
| noon | 72°F | 55°F | 55% | 11.6 mph | 56% |
| 3 p.m. | 73°F | 54°F | 51% | 12.0 mph | 58% |
| 6 p.m. | 70°F | 53°F | 55% | 10.9 mph | 64% |
| 9 p.m. | 63°F | 52°F | 69% | 7.3 mph | 68% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094892. 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 West Chicago?
The warmest May temperature on this station's record (since 1997) is 96°F, on May 27, 2012; the coldest is 26°F, on May 21, 2002. The wettest May brought 7.71 in (2019).
The May mean against the 1991-2020 normal of 59.8°F: 2021 58.5°F (−1.3), 2022 62.4°F (+2.6), 2023 60.9°F (+1.1), 2024 63.3°F (+3.5), 2025 58.1°F (−1.7), 2026 58.8°F (−1.0). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 58.5°F | −1.3°F | 2.18 in |
| 2022 | 62.4°F | +2.6°F | 4.36 in |
| 2023 | 60.9°F | +1.1°F | 1.21 in |
| 2024 | 63.3°F | +3.5°F | 3.42 in |
| 2025 | 58.1°F | −1.7°F | 1.59 in |
| 2026 | 58.8°F | −1.0°F | 1.33 in |
Source: records: ACIS, station USW00094892; recent months: ACIS, station USW00094892. Records and recent months use complete months only.
How does May in West Chicago compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, May normal highs run from 67°F in Waukegan to 79°F in Belleville; West Chicago's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.