Manchester, NH weather in August
Manchester is warm in August, with some rain: highs average 80°F and nights drop to about 59°F. There are about 10 days with rain. This is the peak of the warm season in Manchester. A good month for most outdoor plans.
- Normal high
- 80°F
- Normal low
- 59°F
- Wet days
- 10
- 3.6 in total
- Muggy days
- 7
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 81°F | 78°F |
| Normal low | 61°F | 57°F |
| Chance of a wet day | 35% | 30% |
| Sunrise / sunset | 5:36 am / 8:07 pm | 6:09 am / 7:22 pm |
| Daylight | 14.5 h | 13.2 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical August day
- 6 am64°Fdew point 59°F
- 9 am72°Fdew point 60°F
- Noon79°Fdew point 58°F
- 3 pm80°Fdew point 58°F
- 6 pm77°Fdew point 59°F
- 9 pm70°Fdew point 60°F
NOAA hourly normals (local standard time) from Manchester Airport (4 mi away); average wind 5 mph; clear or few clouds in 58% of daytime hours, mostly cloudy or overcast in 31%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F9 of 31
- Hot dayshigh 90°F or more2 of 31
- Muggy daysdaily mean dew point 65°F or more7 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.6 in; a dry August brings about 2.0 in and a wet one about 4.7 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202001: average high 85°F
- Coolest August1992: average high 75°F
- Wettest August2018: 10.7 in
- Driest August1996: 0.06 in
- Highest reading98°F (August 15, 1991)
- Lowest reading37°F (August 19, 2000)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 81°F | 80°F | 73°F |
| Normal low | 61°F | 59°F | 52°F |
| Wet days | 11 | 10 | 9 |
| Comfortable days | 6 | 9 | 16 |
| Daylight | 15.0 h | 13.9 h | 12.5 h |
Highs change by -1°F from July and -7°F into September.
Nearby alternatives in August
- Warmer: Paterson, NJ200 mi · high 85°F · 10 wet days
- Cooler: Lake Placid, NY154 mi · high 73°F · 13 wet days
How Manchester ranks in August
- Normal high313th warmest of 378 cities; 4th of 4 in New Hampshire
- Wet days251st driest of 378
- Comfortable days75th most of 341
What to pack for Manchester in August
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
August has 21 heating degree days and 159 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Manchester in August?
The normal high is 80°F and the normal low is 59°F. From 1991 to 2020 the hottest August reading was 98°F (August 15, 1991).
Does it rain a lot in Manchester in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 3.6 in. The wettest August in 1991-2020 was in 2018 (10.7 in); the driest was in 1996 (0.06 in).
Is August a good time to visit Manchester?
August ranks 4th of 12 months on our comfort score for Manchester (62 out of 100). It has about 9 comfortable days and about 2 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature and frost dates: Massabesic Lake (USC00275211), 3.1 mi E of the city center, 253 ft . NOAA normals and daily records, 1991-2020.
- Rain, snowfall, snow depth and cloud cover: Concord Muni Airport (USW00014745), 14 mi N of the city center, 346 ft (92 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Manchester Airport (USW00014710), 4.4 mi S of the city center, 225 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Manchester Airport (743945-14710), 4.6 mi SSE of the city center, 229 ft . Hourly observations, 1991-2020.