Edison weather by month
Measured at Somerville/Somerset Arpt
Averages and records for each calendar month at Somerville/Somerset Arpt, United States, from 1999 to 2026. The warmest month is July, averaging 30.7°C; the coolest is January at 4.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.1°C | −6.2°C | 22.8°C6 January 2007 | −22.8°C31 January 2026 | 26 / 27 |
| February | 6.1°C | −5.4°C | 26.1°C21 February 2018 | −22.7°C24 February 2015 | 25 / 27 |
| March | 11.5°C | −0.8°C | 28.9°C29 March 2025 | −18.2°C7 March 2015 | 26 / 27 |
| April | 17.6°C | 4.0°C | 35.0°C17 April 2002 | −7.1°C6 April 2016 | 26 / 27 |
| May | 22.9°C | 9.4°C | 35.6°C19 May 2026 | −1.7°C21 May 2002 | 27 / 27 |
| June | 27.7°C | 14.3°C | 37.8°C24 June 2025 | 3.9°C1 June 2001 | 27 / 28 |
| July | 30.7°C | 17.6°C | 40.0°C22 July 2011 | 7.8°C2 July 2007 | 26 / 27 |
| August | 29.4°C | 16.7°C | 37.8°C2 August 2002 | 8.3°C20 August 2008 | 28 / 28 |
| September | 25.7°C | 12.6°C | 36.1°C8 September 2015 | 1.1°C22 September 2020 | 26 / 28 |
| October | 19.4°C | 6.1°C | 35.0°C2 October 2019 | −5.5°C19 October 2015 | 26 / 27 |
| November | 13.2°C | 0.4°C | 28.3°C6 November 2024 | −12.7°C23 November 2018 | 24 / 27 |
| December | 6.8°C | −3.3°C | 22.8°C6 December 2001 | −21.1°C14 December 2005 | 27 / 27 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 24 to 28 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.