Dover weather in August: Dover, Delaware: normal highs, lows, rain and records for August
Dover in August has a normal high of 85°F and a normal low of 67°F, a daily mean of 76°F, falling from 86°F on the 1st to 83°F by the 31st. Measurable precipitation falls on 8 days in a normal August, 4.92 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 20°C, 125 mm of precipitation in August.
- NOAA stationDover
- Station IDUSC00072730
- Location39.15°N 75.51°W
- Elevation30 ft (9 m)
- Population40,191
- Jan 44° 28°
- Feb 47° 29°
- Mar 55° 35°
- Apr 66° 45°
- May 74° 54°
- Jun 83° 64°
- Jul 87° 69°
- Aug 85° 67°
- Sep 79° 61°
- Oct 69° 50°
- Nov 58° 39°
- Dec 49° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Dover in August?
The normal high is 85°F and the normal low 67°F, for a daily mean of 76.2°F. August is 1.7°F cooler than July and 6.1°F warmer than September. August is the 2nd warmest month of the year in Dover and the wettest. Across the month the normal high falls 3°F, from 86°F on August 1 to 83°F on August 31. From one year to the next August's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 74°F and 78°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 29%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 86°F | 69°F | 29% | 20% |
| August 8 | 86°F | 68°F | 28% | 20% |
| August 15 | 85°F | 68°F | 27% | 19% |
| August 22 | 85°F | 67°F | 26% | 18% |
| August 31 | 83°F | 65°F | 25% | 17% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 86°F | 69°F | 29% | 20% | 14 h 10 min |
| August 2 | 86°F | 69°F | 29% | 20% | 14 h 10 min |
| August 3 | 86°F | 69°F | 29% | 20% | 14 h 10 min |
| August 4 | 86°F | 69°F | 29% | 20% | 14 h 10 min |
| August 5 | 86°F | 69°F | 29% | 20% | 14 h 10 min |
| August 6 | 86°F | 68°F | 29% | 20% | 14 h |
| August 7 | 86°F | 68°F | 29% | 20% | 14 h |
| August 8 | 86°F | 68°F | 28% | 20% | 14 h |
| August 9 | 86°F | 68°F | 28% | 20% | 14 h |
| August 10 | 86°F | 68°F | 28% | 20% | 14 h |
| August 11 | 86°F | 68°F | 28% | 20% | 13 h 50 min |
| August 12 | 86°F | 68°F | 28% | 19% | 13 h 50 min |
| August 13 | 86°F | 68°F | 28% | 19% | 13 h 50 min |
| August 14 | 85°F | 68°F | 28% | 19% | 13 h 50 min |
| August 15 | 85°F | 68°F | 27% | 19% | 13 h 40 min |
| August 16 | 85°F | 67°F | 27% | 19% | 13 h 40 min |
| August 17 | 85°F | 67°F | 27% | 19% | 13 h 40 min |
| August 18 | 85°F | 67°F | 27% | 19% | 13 h 40 min |
| August 19 | 85°F | 67°F | 27% | 19% | 13 h 40 min |
| August 20 | 85°F | 67°F | 26% | 18% | 13 h 30 min |
| August 21 | 85°F | 67°F | 26% | 18% | 13 h 30 min |
| August 22 | 85°F | 67°F | 26% | 18% | 13 h 30 min |
| August 23 | 85°F | 67°F | 26% | 18% | 13 h 30 min |
| August 24 | 85°F | 67°F | 26% | 17% | 13 h 20 min |
| August 25 | 84°F | 66°F | 25% | 17% | 13 h 20 min |
| August 26 | 84°F | 66°F | 25% | 17% | 13 h 20 min |
| August 27 | 84°F | 66°F | 25% | 17% | 13 h 20 min |
| August 28 | 84°F | 66°F | 25% | 17% | 13 h 10 min |
| August 29 | 84°F | 66°F | 25% | 17% | 13 h 10 min |
| August 30 | 84°F | 66°F | 25% | 17% | 13 h 10 min |
| August 31 | 83°F | 65°F | 25% | 17% | 13 h 10 min |
- Normal high
- 85°FAugust average
- Normal low
- 67°FAugust average
- Precipitation
- 4.92 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 6
- Daylight
- 14 h 10 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 27
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00072730; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Dover in August?
On a given August day the chance of 0.01 inch or more is 27% on average, highest around August 1 (29%). In all, 4.92 in falls on 8 days of a normal August, 1 of them with an inch or more.
In a normal August in Dover, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00072730.
What are the records for August in Dover?
The warmest August temperature on this station's record (since 1893) is 102°F, on August 6, 1977; the coldest is 35°F, on August 18, 1924. The wettest August brought 16.08 in (1939).
The August mean against the 1991-2020 normal of 76.2°F: 2022 79.8°F (+3.6), 2023 77.1°F (+0.9), 2024 76.8°F (+0.6), 2025 73.2°F (−3.0), 2026 79.0°F (+2.8). 4 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 79.8°F | +3.6°F | 3.30 in |
| 2023 | 77.1°F | +0.9°F | 2.45 in |
| 2024 | 76.8°F | +0.6°F | 1.20 in |
| 2025 | 73.2°F | −3.0°F | 3.13 in |
| 2026 | 79.0°F | +2.8°F | 4.68 in |
Source: records: ACIS, station USC00072730; recent months: ACIS, station USC00072730. Records and recent months use complete months only.
How does August in Dover compare across Delaware?
Across the 6 places PlainClimate covers in Delaware, August normal highs run from 85°F in Wilmington to 87°F in Newark; Dover's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.