Belleville weather in July: Belleville, Illinois: normal highs, lows, rain and records for July
Belleville in July has a normal high of 90°F and a normal low of 68°F, a daily mean of 79°F, holding near 90°F all month. Measurable precipitation falls on 7 days in a normal July, 4.03 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 32°C and low of 20°C, 102 mm of precipitation in July.
- NOAA stationBelleville Siu Research
- Station IDUSW00013802
- Location38.52°N 89.85°W
- Elevation450 ft (137 m)
- From the center8 miles
- Population40,560
- Jan 43° 24°
- Feb 49° 28°
- Mar 59° 36°
- Apr 71° 46°
- May 79° 56°
- Jun 87° 65°
- Jul 90° 68°
- Aug 89° 65°
- Sep 83° 57°
- Oct 73° 47°
- Nov 58° 37°
- Dec 46° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Belleville in July?
The normal high is 90°F and the normal low 68°F, for a daily mean of 79.0°F. July is 3.1°F warmer than June and 1.8°F warmer than August. July is the warmest month of the year in Belleville and the 4th wettest. From one year to the next July's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Julys in three average between 77°F and 81°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 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 90°F | 67°F | 27% | 21% |
| July 8 | 90°F | 68°F | 26% | 20% |
| July 15 | 90°F | 68°F | 25% | 19% |
| July 22 | 90°F | 68°F | 24% | 18% |
| July 31 | 90°F | 68°F | 24% | 18% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 12, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 90°F | 67°F | 27% | 21% | 14 h 50 min |
| July 2 | 90°F | 67°F | 27% | 20% | 14 h 50 min |
| July 3 | 90°F | 68°F | 27% | 20% | 14 h 50 min |
| July 4 | 90°F | 68°F | 26% | 20% | 14 h 50 min |
| July 5 | 90°F | 68°F | 26% | 20% | 14 h 50 min |
| July 6 | 90°F | 68°F | 26% | 20% | 14 h 50 min |
| July 7 | 90°F | 68°F | 26% | 20% | 14 h 50 min |
| July 8 | 90°F | 68°F | 26% | 20% | 14 h 40 min |
| July 9 | 90°F | 68°F | 25% | 19% | 14 h 40 min |
| July 10 | 90°F | 68°F | 25% | 19% | 14 h 40 min |
| July 11 | 90°F | 68°F | 25% | 19% | 14 h 40 min |
| July 12 | 90°F | 68°F | 25% | 19% | 14 h 40 min |
| July 13 | 90°F | 68°F | 25% | 19% | 14 h 40 min |
| July 14 | 90°F | 68°F | 25% | 19% | 14 h 40 min |
| July 15 | 90°F | 68°F | 25% | 19% | 14 h 40 min |
| July 16 | 90°F | 68°F | 24% | 19% | 14 h 40 min |
| July 17 | 90°F | 68°F | 24% | 18% | 14 h 30 min |
| July 18 | 90°F | 68°F | 24% | 18% | 14 h 30 min |
| July 19 | 90°F | 68°F | 24% | 18% | 14 h 30 min |
| July 20 | 90°F | 68°F | 24% | 18% | 14 h 30 min |
| July 21 | 90°F | 68°F | 24% | 18% | 14 h 30 min |
| July 22 | 90°F | 68°F | 24% | 18% | 14 h 30 min |
| July 23 | 90°F | 68°F | 24% | 18% | 14 h 30 min |
| July 24 | 90°F | 68°F | 24% | 18% | 14 h 20 min |
| July 25 | 90°F | 68°F | 24% | 18% | 14 h 20 min |
| July 26 | 90°F | 68°F | 24% | 18% | 14 h 20 min |
| July 27 | 90°F | 68°F | 24% | 18% | 14 h 20 min |
| July 28 | 90°F | 68°F | 24% | 18% | 14 h 20 min |
| July 29 | 90°F | 68°F | 24% | 18% | 14 h 20 min |
| July 30 | 90°F | 68°F | 24% | 18% | 14 h 10 min |
| July 31 | 90°F | 68°F | 24% | 18% | 14 h 10 min |
- Normal high
- 90°FJuly average
- Normal low
- 68°FJuly average
- Precipitation
- 4.03 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 17
- Daylight
- 14 h 50 min to 14 h 10 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 30
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013802; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Belleville in July?
On a given July day the chance of 0.01 inch or more is 25% on average, highest around July 1 (27%). In all, 4.03 in falls on 7 days of a normal July, 1 of them with an inch or more.
In a normal July in Belleville, 17 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013802.
How humid and windy is Belleville in July?
At 3 p.m. the normal temperature is 86°F with 53% relative humidity and a dew point of 67°F; at 6 a.m. it is 69°F with 92% humidity. The wind averages 4.7 mph, most often from the south-southwest in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 69°F | 67°F | 92% | 3.2 mph | 57% |
| 9 a.m. | 79°F | 69°F | 71% | 5.7 mph | 59% |
| noon | 85°F | 68°F | 57% | 6.8 mph | 51% |
| 3 p.m. | 86°F | 67°F | 53% | 7.3 mph | 52% |
| 6 p.m. | 83°F | 68°F | 61% | 5.8 mph | 62% |
| 9 p.m. | 75°F | 69°F | 82% | 3.3 mph | 70% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013802. 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 July in Belleville?
The warmest July temperature on this station's record (since 1948) is 110°F, on July 14, 1954; the coldest is 43°F, on July 6, 1972. The wettest July brought 16.20 in (2024).
The July mean against the 1991-2020 normal of 79.0°F: 2022 78.7°F (−0.3), 2023 77.6°F (−1.4), 2024 75.7°F (−3.3), 2025 82.0°F (+3.0), 2026 80.6°F (+1.6). 2 of 5 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 78.7°F | −0.3°F | 12.49 in |
| 2023 | 77.6°F | −1.4°F | 3.36 in |
| 2024 | 75.7°F | −3.3°F | 16.20 in |
| 2025 | 82.0°F | +3.0°F | – |
| 2026 | 80.6°F | +1.6°F | 4.43 in |
Source: records: ACIS, station USW00013802; recent months: ACIS, station USW00013802. Records and recent months use complete months only.
How does July in Belleville compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, July normal highs run from 81°F in Barrington to 90°F in Belleville; Belleville's is 90°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.