Hartford weather in August: Hartford, Connecticut: normal highs, lows, rain and records for August
Hartford in August has a normal high of 83°F and a normal low of 62°F, a daily mean of 73°F, falling from 85°F on the 1st to 81°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 4.21 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 17°C, 107 mm of precipitation in August.
- NOAA stationHartford-Bradley International Airport
- Station IDUSW00014740
- Location41.94°N 72.68°W
- Elevation190 ft (58 m)
- From the center12 miles
- Population122,129
- Jan 35° 19°
- Feb 39° 21°
- Mar 47° 28°
- Apr 61° 38°
- May 72° 48°
- Jun 80° 58°
- Jul 85° 63°
- Aug 83° 62°
- Sep 76° 54°
- Oct 64° 42°
- Nov 52° 33°
- Dec 41° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Hartford in August?
The normal high is 83°F and the normal low 62°F, for a daily mean of 72.5°F. August is 1.8°F cooler than July and 7.7°F warmer than September. August is the 2nd warmest month of the year in Hartford and the 4th wettest. Across the month the normal high falls 4°F, from 85°F on August 1 to 81°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 71°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 85°F | 63°F | 35% | 23% |
| August 8 | 84°F | 63°F | 35% | 22% |
| August 15 | 84°F | 62°F | 34% | 21% |
| August 22 | 83°F | 61°F | 32% | 20% |
| August 31 | 81°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 | 85°F | 63°F | 35% | 23% | 14 h 30 min |
| August 2 | 85°F | 63°F | 35% | 23% | 14 h 30 min |
| August 3 | 85°F | 63°F | 35% | 23% | 14 h 20 min |
| August 4 | 85°F | 63°F | 35% | 23% | 14 h 20 min |
| August 5 | 85°F | 63°F | 35% | 23% | 14 h 20 min |
| August 6 | 85°F | 63°F | 35% | 22% | 14 h 20 min |
| August 7 | 85°F | 63°F | 35% | 22% | 14 h 10 min |
| August 8 | 84°F | 63°F | 35% | 22% | 14 h 10 min |
| August 9 | 84°F | 63°F | 34% | 22% | 14 h 10 min |
| August 10 | 84°F | 63°F | 34% | 22% | 14 h 10 min |
| August 11 | 84°F | 63°F | 34% | 22% | 14 h 10 min |
| August 12 | 84°F | 62°F | 34% | 22% | 14 h |
| August 13 | 84°F | 62°F | 34% | 22% | 14 h |
| August 14 | 84°F | 62°F | 34% | 21% | 14 h |
| August 15 | 84°F | 62°F | 34% | 21% | 14 h |
| August 16 | 84°F | 62°F | 33% | 21% | 13 h 50 min |
| August 17 | 83°F | 62°F | 33% | 21% | 13 h 50 min |
| August 18 | 83°F | 62°F | 33% | 21% | 13 h 50 min |
| August 19 | 83°F | 62°F | 33% | 20% | 13 h 50 min |
| August 20 | 83°F | 61°F | 32% | 20% | 13 h 40 min |
| August 21 | 83°F | 61°F | 32% | 20% | 13 h 40 min |
| August 22 | 83°F | 61°F | 32% | 20% | 13 h 40 min |
| August 23 | 83°F | 61°F | 31% | 20% | 13 h 40 min |
| August 24 | 82°F | 61°F | 31% | 19% | 13 h 30 min |
| August 25 | 82°F | 61°F | 31% | 19% | 13 h 30 min |
| August 26 | 82°F | 60°F | 31% | 19% | 13 h 30 min |
| August 27 | 82°F | 60°F | 31% | 19% | 13 h 20 min |
| August 28 | 82°F | 60°F | 30% | 19% | 13 h 20 min |
| August 29 | 81°F | 60°F | 30% | 19% | 13 h 20 min |
| August 30 | 81°F | 59°F | 30% | 18% | 13 h 20 min |
| August 31 | 81°F | 59°F | 30% | 18% | 13 h 10 min |
- Normal high
- 83°FAugust average
- Normal low
- 62°FAugust average
- Precipitation
- 4.21 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 14 h 30 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 23
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014740; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Hartford in August?
On a given August day the chance of 0.01 inch or more is 33% on average, highest around August 1 (35%). In all, 4.21 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Hartford, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014740.
How humid and windy is Hartford in August?
At 3 p.m. the normal temperature is 79°F with 48% relative humidity and a dew point of 58°F; at 6 a.m. it is 61°F with 88% humidity. The wind averages 6.3 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 61°F | 58°F | 88% | 4.2 mph | 44% |
| 9 a.m. | 70°F | 59°F | 68% | 6.3 mph | 46% |
| noon | 77°F | 59°F | 52% | 8.1 mph | 36% |
| 3 p.m. | 79°F | 58°F | 48% | 9.0 mph | 34% |
| 6 p.m. | 75°F | 59°F | 58% | 7.5 mph | 44% |
| 9 p.m. | 68°F | 60°F | 74% | 6.2 mph | 55% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014740. 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 Hartford?
The warmest August temperature on Hartford's official record (since 1905) is 102°F, on August 9, 2001; the coldest is 36°F, on August 31, 1965. The wettest August brought 21.87 in (1955).
The August mean against the 1991-2020 normal of 72.5°F: 2021 74.8°F (+2.3), 2022 76.8°F (+4.3), 2023 71.5°F (−1.0), 2024 73.7°F (+1.2), 2025 69.6°F (−2.9), 2026 73.2°F (+0.7). 4 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.8°F | +2.3°F | 8.80 in |
| 2022 | 76.8°F | +4.3°F | 5.08 in |
| 2023 | 71.5°F | −1.0°F | 3.88 in |
| 2024 | 73.7°F | +1.2°F | 4.85 in |
| 2025 | 69.6°F | −2.9°F | 2.45 in |
| 2026 | 73.2°F | +0.7°F | 4.81 in |
Source: records: ACIS, NWS threaded record BDLthr; recent months: ACIS, station USW00014740. Records and recent months use complete months only.
How does August in Hartford compare across Connecticut?
Across the 13 places PlainClimate covers in Connecticut, August normal highs run from 76°F in Norfolk to 83°F in Hartford; Hartford's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.