Johnstown Weather in August
Average highs run from 83°F on August 1 to 80°F on August 31, and lows from 61°F to 57°F. Normal precipitation for the month is 3.85 in over about 8 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
- 82°F
- Average low
- 59°F
- Precipitation
- 3.85 in
- Record high
- 98°FAug 30, 1953
- Record low
- 36°FAug 29, 1965
- Chance of a freeze
- 0%
- Days of 90°F or more
- 2.5
- Daylight
- 14 h 16 min to 13 h 06 min
- Cloud cover
- 52%
- Humidity
- 68%
- Dew point
- 61°F
- Wind
- 4.7 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 | 83°F | 61°F | 95°F 1999 | 48°F 1992 | 30% | 0% |
| Aug 2 | 83°F | 60°F | 96°F 1991 | 48°F 1959 | 29% | 0% |
| Aug 3 | 82°F | 60°F | 94°F 1955 | 43°F 1965 | 29% | 0% |
| Aug 4 | 82°F | 60°F | 94°F 1955 | 43°F 1965 | 29% | 0% |
| Aug 5 | 82°F | 60°F | 94°F 2005 | 47°F 1957 | 29% | 0% |
| Aug 6 | 82°F | 60°F | 94°F 1955 | 42°F 1957 | 29% | 0% |
| Aug 7 | 82°F | 60°F | 91°F 2024 | 46°F 1957 | 29% | 0% |
| Aug 8 | 82°F | 60°F | 92°F 2001 | 51°F 1957 | 28% | 0% |
| Aug 9 | 82°F | 60°F | 92°F 1980 | 48°F 1964 | 28% | 0% |
| Aug 10 | 82°F | 60°F | 94°F 2007 | 45°F 1972 | 28% | 0% |
| Aug 11 | 82°F | 60°F | 91°F 1980 | 46°F 1967 | 28% | 0% |
| Aug 12 | 82°F | 60°F | 91°F 2002 | 43°F 1967 | 28% | 0% |
| Aug 13 | 82°F | 60°F | 94°F 2005 | 45°F 1964 | 27% | 0% |
| Aug 14 | 82°F | 60°F | 94°F 2005 | 41°F 1964 | 27% | 0% |
| Aug 15 | 82°F | 60°F | 93°F 1965 | 40°F 1963 | 27% | 0% |
| Aug 16 | 82°F | 59°F | 91°F 1995 | 43°F 1963 | 27% | 0% |
| Aug 17 | 82°F | 59°F | 91°F 1987 | 48°F 1976 | 27% | 0% |
| Aug 18 | 82°F | 59°F | 96°F 1988 | 48°F 1962 | 27% | 0% |
| Aug 19 | 82°F | 59°F | 93°F 1955 | 46°F 1958 | 27% | 0% |
| Aug 20 | 82°F | 59°F | 97°F 1983 | 46°F 1957 | 26% | 0% |
| Aug 21 | 81°F | 59°F | 94°F 1962 | 44°F 1956 | 26% | 0% |
| Aug 22 | 81°F | 59°F | 93°F 1959 | 41°F 1982 | 26% | 0% |
| Aug 23 | 81°F | 59°F | 92°F 1959 | 48°F 1973 | 26% | 0% |
| Aug 24 | 81°F | 58°F | 92°F 1954 | 47°F 1955 | 26% | 0% |
| Aug 25 | 81°F | 58°F | 95°F 1959 | 46°F 1956 | 26% | 0% |
| Aug 26 | 81°F | 58°F | 94°F 1959 | 40°F 1958 | 26% | 0% |
| Aug 27 | 81°F | 58°F | 93°F 2024 | 46°F 1958 | 26% | 0% |
| Aug 28 | 81°F | 58°F | 94°F 1953 | 46°F 2025 | 26% | 0% |
| Aug 29 | 80°F | 58°F | 96°F 1953 | 36°F 1965 | 25% | 0% |
| Aug 30 | 80°F | 57°F | 98°F 1953 | 42°F 1986 | 25% | 0% |
| Aug 31 | 80°F | 57°F | 96°F 1953 | 47°F 1984 | 25% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- August 1
- sunrise 6:29 AM, sunset 8:45 PM
- August 31
- sunrise 6:58 AM, sunset 8:04 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00331404 (Centerburg 2 Se), public domain. Records: NOAA GHCN-Daily, station USC00331404, 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.