Richmond weather in September: Richmond, Virginia: normal highs, lows, rain and records for September
Richmond in September has a normal high of 81°F and a normal low of 61°F, a daily mean of 71°F, falling from 85°F on the 1st to 76°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 4.61 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 16°C, 117 mm of precipitation in September.
- NOAA stationRichmond International Airport
- Station IDUSW00013740
- Location37.51°N 77.32°W
- Elevation164 ft (50 m)
- From the center9 miles
- Population233,655
- Jan 48° 29°
- Feb 52° 30°
- Mar 60° 37°
- Apr 70° 46°
- May 78° 56°
- Jun 86° 65°
- Jul 90° 69°
- Aug 88° 68°
- Sep 81° 61°
- Oct 71° 49°
- Nov 60° 39°
- Dec 52° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Richmond in September?
The normal high is 81°F and the normal low 61°F, for a daily mean of 71.2°F. September is 6.3°F cooler than August and 11.2°F warmer than October. September is the 4th warmest month of the year in Richmond and the 3rd wettest. Across the month the normal high falls 9°F, from 85°F on September 1 to 76°F on September 30. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 69°F and 74°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 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 85°F | 65°F | 30% | 19% |
| September 8 | 84°F | 64°F | 30% | 18% |
| September 15 | 82°F | 62°F | 29% | 17% |
| September 22 | 79°F | 59°F | 29% | 17% |
| September 30 | 76°F | 56°F | 28% | 17% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 85°F | 65°F | 30% | 19% | 13 h |
| September 2 | 85°F | 65°F | 30% | 19% | 13 h |
| September 3 | 85°F | 65°F | 30% | 19% | 13 h |
| September 4 | 85°F | 65°F | 30% | 19% | 12 h 50 min |
| September 5 | 84°F | 65°F | 30% | 19% | 12 h 50 min |
| September 6 | 84°F | 64°F | 30% | 19% | 12 h 50 min |
| September 7 | 84°F | 64°F | 30% | 18% | 12 h 50 min |
| September 8 | 84°F | 64°F | 30% | 18% | 12 h 50 min |
| September 9 | 83°F | 64°F | 29% | 18% | 12 h 40 min |
| September 10 | 83°F | 63°F | 29% | 18% | 12 h 40 min |
| September 11 | 83°F | 63°F | 29% | 18% | 12 h 40 min |
| September 12 | 83°F | 63°F | 29% | 18% | 12 h 40 min |
| September 13 | 82°F | 62°F | 29% | 17% | 12 h 30 min |
| September 14 | 82°F | 62°F | 29% | 17% | 12 h 30 min |
| September 15 | 82°F | 62°F | 29% | 17% | 12 h 30 min |
| September 16 | 81°F | 61°F | 29% | 17% | 12 h 30 min |
| September 17 | 81°F | 61°F | 29% | 17% | 12 h 20 min |
| September 18 | 81°F | 61°F | 29% | 17% | 12 h 20 min |
| September 19 | 80°F | 60°F | 29% | 17% | 12 h 20 min |
| September 20 | 80°F | 60°F | 29% | 17% | 12 h 20 min |
| September 21 | 80°F | 59°F | 29% | 17% | 12 h 10 min |
| September 22 | 79°F | 59°F | 29% | 17% | 12 h 10 min |
| September 23 | 79°F | 59°F | 29% | 17% | 12 h 10 min |
| September 24 | 79°F | 58°F | 29% | 17% | 12 h 10 min |
| September 25 | 78°F | 58°F | 29% | 17% | 12 h 10 min |
| September 26 | 78°F | 57°F | 29% | 17% | 12 h |
| September 27 | 78°F | 57°F | 28% | 17% | 12 h |
| September 28 | 77°F | 57°F | 28% | 17% | 12 h |
| September 29 | 77°F | 56°F | 28% | 17% | 12 h |
| September 30 | 76°F | 56°F | 28% | 17% | 11 h 50 min |
- Normal high
- 81°FSeptember average
- Normal low
- 61°FSeptember average
- Precipitation
- 4.61 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 29
- Days at 80°F or more
- 19
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013740; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Richmond in September?
On a given September day the chance of 0.01 inch or more is 29% on average, highest around September 1 (30%). In all, 4.61 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Richmond, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013740.
How humid and windy is Richmond in September?
At 3 p.m. the normal temperature is 75°F with 52% relative humidity and a dew point of 56°F; at 6 a.m. it is 59°F with 89% humidity. The wind averages 6.8 mph, most often from the northwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 59°F | 56°F | 89% | 5.4 mph | 47% |
| 9 a.m. | 67°F | 58°F | 72% | 8.1 mph | 47% |
| noon | 74°F | 57°F | 55% | 8.9 mph | 36% |
| 3 p.m. | 75°F | 56°F | 52% | 9.1 mph | 29% |
| 6 p.m. | 69°F | 57°F | 66% | 6.8 mph | 40% |
| 9 p.m. | 64°F | 58°F | 80% | 5.5 mph | 53% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013740. 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 September in Richmond?
The warmest September temperature on Richmond's official record (since 1897) is 103°F, on September 7, 1954; the coldest is 35°F, on September 24, 1974. The wettest September brought 16.60 in (1999).
The September mean against the 1991-2020 normal of 71.2°F: 2021 72.6°F (+1.4), 2022 72.8°F (+1.6), 2023 73.2°F (+2.0), 2024 72.3°F (+1.1), 2025 70.6°F (−0.6), 2026 74.2°F (+3.0). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 72.6°F | +1.4°F | 5.79 in |
| 2022 | 72.8°F | +1.6°F | 1.68 in |
| 2023 | 73.2°F | +2.0°F | 4.99 in |
| 2024 | 72.3°F | +1.1°F | 2.99 in |
| 2025 | 70.6°F | −0.6°F | 5.68 in |
| 2026 | 74.2°F | +3.0°F | 5.50 in |
Source: records: ACIS, NWS threaded record RICthr; recent months: ACIS, station USW00013740. Records and recent months use complete months only.
How does September in Richmond compare across Virginia?
Across the 81 places PlainClimate covers in Virginia, September normal highs run from 73°F in Floyd to 85°F in Chesapeake; Richmond's is 81°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.