Concord weather in September: Concord, New Hampshire: normal highs, lows, rain and records for September
Concord in September has a normal high of 74°F and a normal low of 49°F, a daily mean of 61°F, falling from 79°F on the 1st to 68°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.63 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 9°C, 92 mm of precipitation in September.
- NOAA stationConcord Municipal Airport
- Station IDUSW00014745
- Location43.20°N 71.50°W
- Elevation346 ft (106 m)
- From the center4 miles
- Population44,674
- Jan 32° 13°
- Feb 35° 15°
- Mar 44° 23°
- Apr 58° 33°
- May 69° 44°
- Jun 78° 54°
- Jul 83° 59°
- Aug 82° 57°
- Sep 74° 49°
- Oct 61° 38°
- Nov 48° 29°
- Dec 37° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Concord in September?
The normal high is 74°F and the normal low 49°F, for a daily mean of 61.4°F. September is 8.1°F cooler than August and 12.1°F warmer than October. September is the 4th warmest month of the year in Concord and the 4th wettest. Across the month the normal high falls 11°F, from 79°F on September 1 to 68°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 59°F and 64°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 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 79°F | 54°F | 29% | 18% |
| September 8 | 77°F | 52°F | 30% | 19% |
| September 15 | 74°F | 49°F | 31% | 20% |
| September 22 | 71°F | 47°F | 32% | 20% |
| September 30 | 68°F | 43°F | 33% | 21% |
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 | 79°F | 54°F | 29% | 18% | 13 h 10 min |
| September 2 | 79°F | 54°F | 29% | 18% | 13 h 10 min |
| September 3 | 79°F | 54°F | 29% | 18% | 13 h 10 min |
| September 4 | 78°F | 53°F | 30% | 18% | 13 h 10 min |
| September 5 | 78°F | 53°F | 30% | 19% | 13 h |
| September 6 | 78°F | 53°F | 30% | 19% | 13 h |
| September 7 | 77°F | 52°F | 30% | 19% | 13 h |
| September 8 | 77°F | 52°F | 30% | 19% | 12 h 50 min |
| September 9 | 77°F | 52°F | 30% | 19% | 12 h 50 min |
| September 10 | 76°F | 51°F | 30% | 19% | 12 h 50 min |
| September 11 | 76°F | 51°F | 30% | 19% | 12 h 50 min |
| September 12 | 75°F | 51°F | 30% | 19% | 12 h 40 min |
| September 13 | 75°F | 50°F | 30% | 19% | 12 h 40 min |
| September 14 | 75°F | 50°F | 30% | 19% | 12 h 40 min |
| September 15 | 74°F | 49°F | 31% | 20% | 12 h 30 min |
| September 16 | 74°F | 49°F | 31% | 20% | 12 h 30 min |
| September 17 | 73°F | 49°F | 31% | 20% | 12 h 30 min |
| September 18 | 73°F | 48°F | 31% | 20% | 12 h 30 min |
| September 19 | 72°F | 48°F | 31% | 20% | 12 h 20 min |
| September 20 | 72°F | 47°F | 31% | 20% | 12 h 20 min |
| September 21 | 72°F | 47°F | 32% | 20% | 12 h 20 min |
| September 22 | 71°F | 47°F | 32% | 20% | 12 h 10 min |
| September 23 | 71°F | 46°F | 32% | 21% | 12 h 10 min |
| September 24 | 70°F | 46°F | 32% | 21% | 12 h 10 min |
| September 25 | 70°F | 45°F | 32% | 21% | 12 h 10 min |
| September 26 | 69°F | 45°F | 33% | 21% | 12 h |
| September 27 | 69°F | 45°F | 33% | 21% | 12 h |
| September 28 | 68°F | 44°F | 33% | 21% | 12 h |
| September 29 | 68°F | 44°F | 33% | 21% | 11 h 50 min |
| September 30 | 68°F | 43°F | 33% | 21% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 49°FSeptember average
- Precipitation
- 3.63 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 1
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 20
- Days at 80°F or more
- 8
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014745; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Concord in September?
On a given September day the chance of 0.01 inch or more is 31% on average, highest around September 30 (33%). In all, 3.63 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Concord, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014745.
How humid and windy is Concord in September?
At 3 p.m. the normal temperature is 66°F with 51% relative humidity and a dew point of 47°F; at 6 a.m. it is 47°F with 92% humidity. The wind averages 4.7 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 47°F | 45°F | 92% | 2.9 mph | – |
| 9 a.m. | 56°F | 48°F | 74% | 5.2 mph | 59% |
| noon | 64°F | 47°F | 55% | 8.0 mph | 55% |
| 3 p.m. | 66°F | 47°F | 51% | 8.3 mph | 59% |
| 6 p.m. | 58°F | 48°F | 69% | 4.6 mph | 65% |
| 9 p.m. | 53°F | 48°F | 83% | 3.1 mph | 66% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014745. 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 Concord?
The warmest September temperature on Concord's official record (since 1868) is 98°F, on September 2, 1953; the coldest is 20°F, on September 30, 1941. The wettest September brought 10.97 in (1888).
The September mean against the 1991-2020 normal of 61.4°F: 2021 63.2°F (+1.8), 2022 60.6°F (−0.8), 2023 64.4°F (+3.0), 2024 62.2°F (+0.8), 2025 62.9°F (+1.5), 2026 61.3°F (−0.1). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 63.2°F | +1.8°F | 4.46 in |
| 2022 | 60.6°F | −0.8°F | 4.16 in |
| 2023 | 64.4°F | +3.0°F | 4.28 in |
| 2024 | 62.2°F | +0.8°F | 1.83 in |
| 2025 | 62.9°F | +1.5°F | 3.13 in |
| 2026 | 61.3°F | −0.1°F | 4.42 in |
Source: records: ACIS, NWS threaded record CONthr; recent months: ACIS, station USW00014745. Records and recent months use complete months only.
How does September in Concord compare across New Hampshire?
Across the 28 places PlainClimate covers in New Hampshire, September normal highs run from 68°F in Colebrook to 75°F in Nashua; Concord's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.