Radnor Weather in August
Average highs run from 88°F on August 1 to 85°F on August 31, and lows from 66°F to 63°F. Normal precipitation for the month is 4.98 in over about 10 wet days.
August day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 87°F
- Average low
- 65°F
- Precipitation
- 4.98 in
- Record high
- 106°FAug 10, 2001
- Record low
- 40°FAug 30, 1982
- Chance of a freeze
- 0%
- Days of 90°F or more
- 10.1
- Daylight
- 14 h 15 min to 13 h 06 min
- Cloud cover
- 56%
- Humidity
- 71%
- Dew point
- 63°F
- Wind
- 4.0 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Aug 1 | 88°F | 66°F | 100°F 1983 | 58°F 1964 | 37% | 0% |
| Aug 2 | 88°F | 66°F | 101°F 1955 | 55°F 1976 | 37% | 0% |
| Aug 3 | 88°F | 66°F | 102°F 2002 | 53°F 1953 | 37% | 0% |
| Aug 4 | 88°F | 66°F | 100°F 2006 | 49°F 1951 | 37% | 0% |
| Aug 5 | 88°F | 66°F | 100°F 1955 | 48°F 1951 | 36% | 0% |
| Aug 6 | 88°F | 66°F | 104°F 2005 | 48°F 1951 | 36% | 0% |
| Aug 7 | 87°F | 66°F | 96°F 2001 | 54°F 2004 | 36% | 0% |
| Aug 8 | 87°F | 66°F | 100°F 2001 | 54°F 2004 | 36% | 0% |
| Aug 9 | 87°F | 66°F | 100°F 2001 | 55°F 1964 | 36% | 0% |
| Aug 10 | 87°F | 66°F | 106°F 2001 | 54°F 1964 | 36% | 0% |
| Aug 11 | 87°F | 66°F | 102°F 2001 | 52°F 1972 | 35% | 0% |
| Aug 12 | 87°F | 66°F | 99°F 2016 | 54°F 1968 | 35% | 0% |
| Aug 13 | 87°F | 66°F | 102°F 2005 | 52°F 1979 | 35% | 0% |
| Aug 14 | 87°F | 66°F | 104°F 2005 | 51°F 1961 | 34% | 0% |
| Aug 15 | 87°F | 66°F | 102°F 2005 | 51°F 1964 | 34% | 0% |
| Aug 16 | 87°F | 66°F | 98°F 2002 | 50°F 1979 | 34% | 0% |
| Aug 17 | 87°F | 65°F | 98°F 2002 | 45°F 1979 | 34% | 0% |
| Aug 18 | 86°F | 65°F | 100°F 2002 | 50°F 1979 | 33% | 0% |
| Aug 19 | 86°F | 65°F | 98°F 2002 | 50°F 1953 | 33% | 0% |
| Aug 20 | 86°F | 65°F | 98°F 2002 | 49°F 2000 | 33% | 0% |
| Aug 21 | 86°F | 65°F | 100°F 1983 | 47°F 1977 | 32% | 0% |
| Aug 22 | 86°F | 65°F | 96°F 2005 | 47°F 1982 | 32% | 0% |
| Aug 23 | 86°F | 65°F | 96°F 1983 | 49°F 1952 | 32% | 0% |
| Aug 24 | 86°F | 65°F | 95°F 1972 | 48°F 1952 | 31% | 0% |
| Aug 25 | 86°F | 64°F | 96°F 1968 | 50°F 1952 | 31% | 0% |
| Aug 26 | 86°F | 64°F | 98°F 2007 | 50°F 2019 | 31% | 0% |
| Aug 27 | 85°F | 64°F | 99°F 1953 | 53°F 1963 | 30% | 0% |
| Aug 28 | 85°F | 64°F | 99°F 1973 | 52°F 1968 | 30% | 0% |
| Aug 29 | 85°F | 64°F | 98°F 1953 | 42°F 1982 | 30% | 0% |
| Aug 30 | 85°F | 63°F | 100°F 1953 | 40°F 1982 | 30% | 0% |
| Aug 31 | 85°F | 63°F | 102°F 1953 | 47°F 1986 | 29% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- August 1
- sunrise 6:00 AM, sunset 8:15 PM
- August 31
- sunrise 6:28 AM, sunset 7:34 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00366370 (Norristown), public domain. Records: NOAA GHCN-Daily, station USC00366370, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.