Weather on August 21
Modesto, CA
55 Years of Data
About This Date
August 21st in Modesto, CA typically brings hot summer weather, with average highs around 91°F and lows near 61°F — a 30°F daily swing. Over 55 years of records, the warmest August 21st was in 2007 (85°F average), while the coldest was 2021 (70°F) — a 15°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 21st dates historically. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Modesto, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 101° | 64° | 82° | — | — |
| 2024 | 94° | 64° | 79° | — | — |
| 2023 | 85° | 67° | 76° | — | — |
| 2022 | 95° | 67° | 81° | — | — |
| 2021coldest | 82° | 58° | 70° | — | — |
| 2020 | 90° | 68° | 79° | — | — |
| 2019 | 95° | 61° | 78° | — | — |
| 2018 | 85° | 58° | 71° | — | — |
| 2017 | 88° | 65° | 76° | — | — |
| 2016 | 95° | 64° | 80° | — | — |
| 2015 | 93° | 62° | 78° | — | — |
| 2014 | 91° | 60° | 76° | — | — |
| 2013 | 94° | 64° | 79° | — | — |
| 2012 | 95° | 62° | 79° | — | — |
| 2011 | 89° | 58° | 73° | — | — |
| 2010 | 84° | 58° | 71° | — | — |
| 2009 | 98° | 61° | 79° | — | — |
| 2008 | 91° | 70° | 80° | — | — |
| 2007warmest | 100° | 69° | 85° | — | — |
| 2006 | 90° | 58° | 74° | — | — |
| 2005 | 93° | 61° | 77° | — | — |
| 2004 | 89° | 62° | 76° | — | — |
| 2003 | 82° | 65° | 73° | 0.25" | — |
| 2002 | 89° | 57° | 73° | — | — |
| 2001 | 85° | 57° | 71° | — | — |
| 2000 | 92° | 56° | 74° | — | — |
| 1999 | 94° | 60° | 77° | — | — |
| 1998 | 88° | 56° | 72° | — | — |
| 1997 | 95° | 63° | 79° | — | — |
| 1996 | 92° | 60° | 76° | — | — |
| 1995 | 95° | 70° | 82° | — | — |
| 1994 | 90° | 59° | 74° | — | — |
| 1993 | 90° | 62° | 76° | — | — |
| 1992 | 89° | 63° | 76° | — | — |
| 1991 | 90° | 57° | 73° | — | — |
| 1990 | 86° | 60° | 73° | — | — |
| 1989 | 86° | 58° | 72° | — | — |
| 1988 | 89° | 61° | 75° | — | — |
| 1987 | 87° | 55° | 71° | — | — |
| 1986 | 93° | 59° | 76° | — | — |
| 1985 | 90° | 55° | 72° | — | — |
| 1984 | 91° | 58° | 74° | — | — |
| 1983 | 84° | 60° | 72° | — | — |
| 1982 | 100° | 65° | 82° | — | — |
| 1981 | 93° | 56° | 74° | — | — |
| 1980 | 90° | 60° | 75° | — | — |
| 1979 | 84° | 58° | 71° | — | — |
| 1978 | 86° | 61° | 73° | — | — |
| 1977 | 95° | 58° | 76° | — | — |
| 1976 | 86° | 61° | 73° | — | — |
| 1975 | 89° | 62° | 76° | — | — |
| 1974 | 96° | 58° | 77° | — | — |
| 1973 | 91° | 61° | 76° | — | — |
| 1972 | 94° | 58° | 76° | — | — |
| 1971 | 89° | 58° | 73° | — | — |
Modesto, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Modesto, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Modesto, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Modesto, CA
Modesto, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.