Casco Weather in August
Average highs run from 77°F on August 1 to 73°F on August 31, and lows from 61°F to 57°F. Normal precipitation for the month is 3.42 in over about 9 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
- 75°F
- Average low
- 60°F
- Precipitation
- 3.42 in
- Record high
- 102°FAug 21, 1955
- Record low
- 32°FAug 30, 1934
- Chance of a freeze
- 0%
- Days of 90°F or more
- 0.6
- Daylight
- 14 h 39 min to 13 h 17 min
- Cloud cover
- 61%
- Humidity
- 74%
- Dew point
- 61°F
- Wind
- 11.4 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 | 77°F | 61°F | 98°F 2006 | 42°F 1947 | 29% | 0% |
| Aug 2 | 77°F | 61°F | 96°F 1988 | 43°F 1927 | 29% | 0% |
| Aug 3 | 77°F | 61°F | 95°F 1908 | 44°F 1907 | 29% | 0% |
| Aug 4 | 77°F | 61°F | 94°F 1955 | 38°F 1927 | 29% | 0% |
| Aug 5 | 77°F | 61°F | 95°F 1955 | 43°F 1927 | 29% | 0% |
| Aug 6 | 77°F | 61°F | 92°F 1937 | 45°F 1994 | 28% | 0% |
| Aug 7 | 76°F | 61°F | 92°F 2001 | 42°F 1989 | 28% | 0% |
| Aug 8 | 76°F | 61°F | 95°F 2001 | 42°F 1926 | 28% | 0% |
| Aug 9 | 76°F | 61°F | 97°F 2001 | 42°F 1964 | 28% | 0% |
| Aug 10 | 76°F | 61°F | 95°F 1944 | 40°F 1972 | 28% | 0% |
| Aug 11 | 76°F | 61°F | 94°F 1944 | 40°F 1967 | 28% | 0% |
| Aug 12 | 76°F | 61°F | 92°F 1947 | 41°F 1950 | 28% | 0% |
| Aug 13 | 76°F | 61°F | 96°F 1944 | 41°F 1950 | 28% | 0% |
| Aug 14 | 76°F | 60°F | 95°F 1965 | 42°F 1924 | 28% | 0% |
| Aug 15 | 76°F | 60°F | 94°F 1965 | 43°F 1927 | 28% | 0% |
| Aug 16 | 76°F | 60°F | 96°F 1913 | 40°F 1912 | 28% | 0% |
| Aug 17 | 75°F | 60°F | 93°F 1922 | 42°F 1941 | 27% | 0% |
| Aug 18 | 75°F | 60°F | 99°F 1955 | 39°F 1963 | 27% | 0% |
| Aug 19 | 75°F | 60°F | 96°F 1955 | 41°F 1929 | 27% | 0% |
| Aug 20 | 75°F | 60°F | 98°F 1916 | 36°F 1908 | 27% | 0% |
| Aug 21 | 75°F | 59°F | 102°F 1955 | 39°F 1907 | 27% | 0% |
| Aug 22 | 75°F | 59°F | 96°F 1968 | 36°F 1950 | 27% | 0% |
| Aug 23 | 75°F | 59°F | 95°F 1947 | 41°F 1940 | 27% | 0% |
| Aug 24 | 74°F | 59°F | 96°F 1948 | 39°F 1927 | 27% | 0% |
| Aug 25 | 74°F | 59°F | 93°F 1925 | 39°F 1934 | 27% | 0% |
| Aug 26 | 74°F | 58°F | 95°F 1953 | 41°F 1934 | 27% | 0% |
| Aug 27 | 74°F | 58°F | 95°F 1953 | 33°F 1915 | 27% | 0% |
| Aug 28 | 74°F | 58°F | 94°F 1953 | 38°F 1915 | 27% | 0% |
| Aug 29 | 74°F | 58°F | 96°F 1953 | 33°F 1934 | 27% | 0% |
| Aug 30 | 73°F | 57°F | 95°F 1969 | 32°F 1934 | 26% | 0% |
| Aug 31 | 73°F | 57°F | 90°F 1960 | 40°F 2009 | 26% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- August 1
- sunrise 5:37 AM, sunset 8:16 PM
- August 31
- sunrise 6:12 AM, sunset 7:29 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00474195 (Kewaunee), public domain. Records: NOAA GHCN-Daily, station USC00478267, 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.