Kingshuk Mondal / CC BY 4.0
Edison, NJ Weather on August 18
August 18th in Edison, NJ typically brings warm summer weather, with average highs around 85°F and lows near 64°F. Over 55 years of records, the warmest August 18th was in 2002 (85°F average), while the coldest was 1979 (63°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 44% of August 18th dates historically, with the wettest August 18th recording 2.73" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
What to Expect on August 18
Planning for August 18th in Edison, NJ? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
August 18 Weather Records for Edison
- •The all-time record high for August 18th in Edison, NJ is 98°F, set in 2015.
- •The coldest August 18th on record dropped to 49°F in 1981.
- •Temperatures have reached 90°F or higher on August 18th in 11 of the last 55 years.
Frequently Asked Questions
What was the warmest August 18 ever in Edison?
The warmest August 18 in Edison, NJ reached 98°F in 2015. That is 13°F above the long-term average high of 85°F.
What was the coldest August 18 ever in Edison?
The coldest August 18 in Edison, NJ dropped to 49°F in 1981. That is 15°F below the long-term average low of 64°F.
What is the average temperature on August 18 in Edison?
On August 18, Edison averages a high of 85°F and a low of 64°F based on 55 years of NOAA weather observations from NEW BRUNSWICK 3 SE.
How many years of weather data are available for August 18 in Edison?
We have 55 years of weather records for August 18 in Edison, NJ, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
August 18 Weather History in Edison
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 94°F | 66°F | 0.07" | -- |
| 2024 | 80°F | 68°F | 0.37" | -- |
| 2023 | 81°F | 66°F | 1.18" | -- |
| 2022 | 81°F | 57°F | 0.1" | -- |
| 2021 | 84°F | 71°F | 0" | -- |
| 2020 | 83°F | 61°F | 1.1" | -- |
| 2019 | 88°F | 72°F | 0" | -- |
| 2018 | 92°F | 73°F | 0.11" | -- |
| 2017 | 82°F | 71°F | 0.04" | -- |
| 2016 | 88°F | 71°F | 0.03" | -- |
| 2015 | 98°F | 72°F | 0" | -- |
| 2014 | 84°F | 53°F | 0.02" | -- |
| 2013 | 85°F | 60°F | 0.01" | -- |
| 2012 | 89°F | 63°F | 0.57" | -- |
| 2011 | 89°F | 65°F | 0" | -- |
| 2010 | 93°F | 65°F | 0" | -- |
| 2009 | 94°F | 65°F | 0" | -- |
| 2008 | 88°F | 60°F | 0" | -- |
| 2007 | 87°F | 56°F | 2.73" | -- |
| 2006 | 86°F | 64°F | 0" | -- |
| 2005 | 88°F | 60°F | 0" | -- |
| 2004 | 80°F | 63°F | 0" | -- |
| 2003 | 84°F | 60°F | 0.38" | -- |
| 2002 | 96°F | 73°F | 0.09" | -- |
| 2001 | 86°F | 62°F | 0.01" | -- |
| 2000 | 76°F | 63°F | 0" | -- |
| 1999 | 90°F | 68°F | 0" | -- |
| 1998 | 82°F | 68°F | 0.76" | -- |
| 1997 | 91°F | 64°F | 0.14" | -- |
| 1996 | 86°F | 62°F | 0" | -- |
| 1995 | 90°F | 72°F | 0" | -- |
| 1994 | 77°F | 66°F | 0.55" | -- |
| 1993 | 77°F | 67°F | 0.03" | -- |
| 1992 | 70°F | 61°F | 0.63" | -- |
| 1991 | 87°F | 69°F | 0" | -- |
| 1990 | 88°F | 65°F | 0" | -- |
| 1989 | 84°F | 63°F | 0" | -- |
| 1988 | 88°F | 63°F | 0.12" | -- |
| 1987 | 92°F | 76°F | 0" | -- |
| 1986 | 85°F | 69°F | 0.44" | -- |
| 1985 | 82°F | 60°F | 0" | -- |
| 1984 | 86°F | 59°F | 0" | -- |
| 1983 | 87°F | 63°F | 0" | -- |
| 1982 | 87°F | 60°F | 0" | -- |
| 1981 | 78°F | 49°F | 0" | -- |
| 1980 | 85°F | 60°F | 0" | -- |
| 1979 | 75°F | 50°F | 0" | -- |
| 1978 | 90°F | 66°F | 0" | -- |
| 1977 | 83°F | 60°F | 0.2" | -- |
| 1976 | 83°F | 60°F | 0" | -- |
| 1975 | 73°F | 65°F | 0" | -- |
| 1974 | 83°F | 65°F | 1.22" | -- |
| 1973 | 79°F | 63°F | 0" | -- |
| 1972 | 72°F | 62°F | 0" | -- |
| 1971 | 83°F | 58°F | 0" | -- |
Based on 55 years of data from NOAA station: NEW BRUNSWICK 3 SE
Monthly Climate Averages
Historical temperature and precipitation averages for Edison, NJ, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.