Jamestown weather in August: Jamestown, North Dakota: normal highs, lows, rain and records for August
Jamestown in August has a normal high of 80°F and a normal low of 55°F, a daily mean of 68°F, falling from 82°F on the 1st to 77°F by the 31st. Measurable precipitation falls on 9 days in a normal August, 2.42 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 13°C, 61 mm of precipitation in August.
- NOAA stationJamestown Municipal Airport
- Station IDUSW00014919
- Location46.93°N 98.67°W
- Elevation1,494 ft (455 m)
- From the center2 miles
- Population15,789
- Jan 19° 1°
- Feb 24° 5°
- Mar 37° 17°
- Apr 53° 30°
- May 67° 43°
- Jun 76° 54°
- Jul 81° 58°
- Aug 80° 55°
- Sep 71° 46°
- Oct 55° 33°
- Nov 38° 19°
- Dec 24° 7°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Jamestown in August?
The normal high is 80°F and the normal low 55°F, for a daily mean of 67.5°F. August is 2.2°F cooler than July and 9.1°F warmer than September. August is the 2nd warmest month of the year in Jamestown and the 4th wettest. Across the month the normal high falls 5°F, from 82°F on August 1 to 77°F on August 31. From one year to the next August's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 65°F and 70°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 |
|---|---|---|---|---|
| August 1 | 82°F | 58°F | 30% | 16% |
| August 8 | 81°F | 57°F | 29% | 15% |
| August 15 | 80°F | 56°F | 28% | 14% |
| August 22 | 79°F | 54°F | 27% | 14% |
| August 31 | 77°F | 52°F | 27% | 14% |
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 | 82°F | 58°F | 30% | 16% | 15 h |
| August 2 | 82°F | 58°F | 30% | 16% | 14 h 50 min |
| August 3 | 82°F | 58°F | 29% | 15% | 14 h 50 min |
| August 4 | 82°F | 58°F | 29% | 15% | 14 h 50 min |
| August 5 | 82°F | 57°F | 29% | 15% | 14 h 50 min |
| August 6 | 82°F | 57°F | 29% | 15% | 14 h 40 min |
| August 7 | 82°F | 57°F | 29% | 15% | 14 h 40 min |
| August 8 | 81°F | 57°F | 29% | 15% | 14 h 40 min |
| August 9 | 81°F | 57°F | 29% | 15% | 14 h 30 min |
| August 10 | 81°F | 57°F | 28% | 15% | 14 h 30 min |
| August 11 | 81°F | 57°F | 28% | 15% | 14 h 30 min |
| August 12 | 81°F | 56°F | 28% | 15% | 14 h 30 min |
| August 13 | 81°F | 56°F | 28% | 14% | 14 h 20 min |
| August 14 | 81°F | 56°F | 28% | 14% | 14 h 20 min |
| August 15 | 80°F | 56°F | 28% | 14% | 14 h 20 min |
| August 16 | 80°F | 56°F | 28% | 14% | 14 h 10 min |
| August 17 | 80°F | 55°F | 28% | 14% | 14 h 10 min |
| August 18 | 80°F | 55°F | 27% | 14% | 14 h 10 min |
| August 19 | 80°F | 55°F | 27% | 14% | 14 h 10 min |
| August 20 | 79°F | 55°F | 27% | 14% | 14 h |
| August 21 | 79°F | 54°F | 27% | 14% | 14 h |
| August 22 | 79°F | 54°F | 27% | 14% | 14 h |
| August 23 | 79°F | 54°F | 27% | 14% | 13 h 50 min |
| August 24 | 79°F | 54°F | 27% | 14% | 13 h 50 min |
| August 25 | 78°F | 53°F | 27% | 14% | 13 h 50 min |
| August 26 | 78°F | 53°F | 27% | 14% | 13 h 40 min |
| August 27 | 78°F | 53°F | 27% | 14% | 13 h 40 min |
| August 28 | 78°F | 52°F | 27% | 14% | 13 h 40 min |
| August 29 | 77°F | 52°F | 27% | 14% | 13 h 30 min |
| August 30 | 77°F | 52°F | 27% | 14% | 13 h 30 min |
| August 31 | 77°F | 52°F | 27% | 14% | 13 h 30 min |
- Normal high
- 80°FAugust average
- Normal low
- 55°FAugust average
- Precipitation
- 2.42 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 15 h to 13 h 30 minAugust 1 to August 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 16
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014919; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Jamestown in August?
On a given August day the chance of 0.01 inch or more is 28% on average, highest around August 1 (30%). In all, 2.42 in falls on 9 days of a normal August, 1 of them with an inch or more.
In a normal August in Jamestown, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014919.
How humid and windy is Jamestown in August?
At 3 p.m. the normal temperature is 76°F with 47% relative humidity and a dew point of 54°F; at 6 a.m. it is 56°F with 88% humidity. The wind averages 9.4 mph, most often from the southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 56°F | 52°F | 88% | 7.4 mph | – |
| 9 a.m. | 65°F | 55°F | 72% | 10.7 mph | – |
| noon | 73°F | 55°F | 54% | 12.3 mph | – |
| 3 p.m. | 76°F | 54°F | 47% | 12.8 mph | – |
| 6 p.m. | 73°F | 55°F | 53% | 10.2 mph | 78% |
| 9 p.m. | 63°F | 55°F | 76% | 7.7 mph | 80% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014919. 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 August in Jamestown?
The warmest August temperature on this station's record (since 1948) is 106°F, on August 9, 1958; the coldest is 32°F, on August 27, 1982. The wettest August brought 5.73 in (1980).
The August mean against the 1991-2020 normal of 67.5°F: 2021 71.0°F (+3.5), 2022 69.7°F (+2.2), 2023 68.5°F (+1.0), 2024 67.0°F (−0.5), 2025 67.5°F (at normal), 2026 67.2°F (−0.3). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.0°F | +3.5°F | 1.82 in |
| 2022 | 69.7°F | +2.2°F | 1.12 in |
| 2023 | 68.5°F | +1.0°F | 1.54 in |
| 2024 | 67.0°F | −0.5°F | 3.34 in |
| 2025 | 67.5°F | at normal | 3.06 in |
| 2026 | 67.2°F | −0.3°F | 1.99 in |
Source: records: ACIS, station USW00014919; recent months: ACIS, station USW00014919. Records and recent months use complete months only.
How does August in Jamestown compare across North Dakota?
Across the 92 places PlainClimate covers in North Dakota, August normal highs run from 75°F in Rolla to 86°F in Beulah; Jamestown's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.