Manchester weather in August: Manchester, New Hampshire: normal highs, lows, rain and records for August
Manchester in August has a normal high of 82°F and a normal low of 62°F, a daily mean of 72°F, falling from 84°F on the 1st to 80°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 3.35 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 85 mm of precipitation in August.
- NOAA stationManchester Airport
- Station IDUSW00014710
- Location42.93°N 71.44°W
- Elevation225 ft (69 m)
- From the center4 miles
- Population116,386
- Jan 34° 17°
- Feb 37° 19°
- Mar 46° 27°
- Apr 59° 38°
- May 70° 48°
- Jun 79° 58°
- Jul 84° 64°
- Aug 82° 62°
- Sep 75° 54°
- Oct 62° 42°
- Nov 50° 33°
- Dec 39° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Manchester in August?
The normal high is 82°F and the normal low 62°F, for a daily mean of 72.2°F. August is 1.6°F cooler than July and 7.9°F warmer than September. August is the 2nd warmest month of the year in Manchester and the 7th wettest. Across the month the normal high falls 4°F, from 84°F on August 1 to 80°F on August 31. From one year to the next August's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 70°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 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 84°F | 64°F | 36% | 22% |
| August 8 | 83°F | 63°F | 36% | 22% |
| August 15 | 83°F | 63°F | 34% | 20% |
| August 22 | 82°F | 61°F | 32% | 19% |
| August 31 | 80°F | 59°F | 30% | 18% |
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 | 84°F | 64°F | 36% | 22% | 14 h 30 min |
| August 2 | 84°F | 64°F | 36% | 22% | 14 h 30 min |
| August 3 | 84°F | 64°F | 36% | 22% | 14 h 30 min |
| August 4 | 84°F | 64°F | 36% | 22% | 14 h 30 min |
| August 5 | 84°F | 64°F | 36% | 22% | 14 h 20 min |
| August 6 | 84°F | 64°F | 36% | 22% | 14 h 20 min |
| August 7 | 84°F | 63°F | 36% | 22% | 14 h 20 min |
| August 8 | 83°F | 63°F | 36% | 22% | 14 h 20 min |
| August 9 | 83°F | 63°F | 35% | 22% | 14 h 10 min |
| August 10 | 83°F | 63°F | 35% | 21% | 14 h 10 min |
| August 11 | 83°F | 63°F | 35% | 21% | 14 h 10 min |
| August 12 | 83°F | 63°F | 35% | 21% | 14 h 10 min |
| August 13 | 83°F | 63°F | 35% | 21% | 14 h |
| August 14 | 83°F | 63°F | 35% | 21% | 14 h |
| August 15 | 83°F | 63°F | 34% | 20% | 14 h |
| August 16 | 83°F | 62°F | 34% | 20% | 14 h |
| August 17 | 83°F | 62°F | 34% | 20% | 13 h 50 min |
| August 18 | 82°F | 62°F | 34% | 20% | 13 h 50 min |
| August 19 | 82°F | 62°F | 33% | 19% | 13 h 50 min |
| August 20 | 82°F | 62°F | 33% | 19% | 13 h 50 min |
| August 21 | 82°F | 62°F | 33% | 19% | 13 h 40 min |
| August 22 | 82°F | 61°F | 32% | 19% | 13 h 40 min |
| August 23 | 82°F | 61°F | 32% | 19% | 13 h 40 min |
| August 24 | 82°F | 61°F | 32% | 18% | 13 h 40 min |
| August 25 | 81°F | 61°F | 32% | 18% | 13 h 30 min |
| August 26 | 81°F | 61°F | 31% | 18% | 13 h 30 min |
| August 27 | 81°F | 60°F | 31% | 18% | 13 h 30 min |
| August 28 | 81°F | 60°F | 31% | 18% | 13 h 20 min |
| August 29 | 80°F | 60°F | 31% | 18% | 13 h 20 min |
| August 30 | 80°F | 60°F | 31% | 18% | 13 h 20 min |
| August 31 | 80°F | 59°F | 30% | 18% | 13 h 20 min |
- Normal high
- 82°FAugust average
- Normal low
- 62°FAugust average
- Precipitation
- 3.35 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 14 h 30 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 21
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014710; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Manchester in August?
On a given August day the chance of 0.01 inch or more is 34% on average, highest around August 1 (36%). In all, 3.35 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Manchester, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014710.
How humid and windy is Manchester in August?
At 3 p.m. the normal temperature is 79°F with 45% relative humidity and a dew point of 56°F; at 6 a.m. it is 61°F with 85% humidity. The wind averages 5.6 mph, most often from the west in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 61°F | 57°F | 85% | 3.5 mph | – |
| 9 a.m. | 70°F | 57°F | 65% | 5.9 mph | – |
| noon | 77°F | 56°F | 48% | 7.9 mph | – |
| 3 p.m. | 79°F | 56°F | 45% | 8.8 mph | – |
| 6 p.m. | 75°F | 57°F | 54% | 7.3 mph | 65% |
| 9 p.m. | 68°F | 58°F | 70% | 4.3 mph | 71% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014710. 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 Manchester?
The warmest August temperature on Manchester's official record (since 1885) is 100°F, on August 10, 1949; the coldest is 40°F, on August 23, 1886. The wettest August brought 7.23 in (2011).
The August mean against the 1991-2020 normal of 72.2°F: 2021 75.4°F (+3.2), 2022 76.5°F (+4.3), 2023 70.5°F (−1.8), 2024 71.5°F (−0.7), 2025 69.3°F (−2.9), 2026 72.6°F (+0.4). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.4°F | +3.2°F | 2.88 in |
| 2022 | 76.5°F | +4.3°F | 1.67 in |
| 2023 | 70.5°F | −1.8°F | 4.04 in |
| 2024 | 71.5°F | −0.7°F | 5.70 in |
| 2025 | 69.3°F | −2.9°F | 0.64 in |
| 2026 | 72.6°F | +0.4°F | 2.04 in |
Source: records: ACIS, NWS threaded record MHTthr; recent months: ACIS, station USW00014710. Records and recent months use complete months only.
How does August in Manchester compare across New Hampshire?
Across the 28 places PlainClimate covers in New Hampshire, August normal highs run from 76°F in Colebrook to 83°F in Nashua; Manchester's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Manchester in July84°F by day, 64°F at night
- Manchester in September75°F by day, 54°F at night
- Manchester through the yearEvery month, frost dates, records and recent years
- New Hampshire in AugustThe statewide normal and the warmest and coolest places
- Nashua: New Hampshire's warmest Augustnormal high 83°F