July is one of the warmer months of the year in Saint-Lazare, with average highs near 25.5°C and lows around 15.2°C (mean 20.4°C). It is a relatively wet time of year, averaging 93 mm of rainfall and 78% relative humidity across the period.
July is one of the warmer months of the year in Saint-Lazare. Across 45 years of records, the warmest July in Saint-Lazare was 2020 — when the month averaged 23.9°C — while the coldest was 1992 at 17.2°C. Typical July days reach 25.5°C with nights near 15.2°C. The long-term trend is warming, about 0.5°C per decade.
July is a relatively wet time of year in Saint-Lazare, averaging 93 mm of rainfall. The wettest July on record was 2009 with 170 mm, while the driest was 2001 at 49 mm.
Relative humidity in Saint-Lazare during July averages 78%. The most humid July was 2009 at 85%, and the least humid was 2012 at 66%.
July receives about 5.8 kWh/m²/day of solar energy in Saint-Lazare. The sunniest Julys were 1989 and 2018 at 6.6 kWh/m²/day, and the cloudiest was 2009 at 4.9.
Average wind speed in Saint-Lazare during July is 0.9 m/s. The windiest Julys were 1999, 2002 and 2003, among others at 1 m/s, while the calmest was 2023 at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.7°C | 20.0°C | 19.7°C | 21.0°C | 22.0°C | +2.3°C |
| Avg High | 25.0°C | 25.0°C | 24.4°C | 26.2°C | 27.5°C | +2.5°C |
| Avg Low | 14.5°C | 14.9°C | 14.9°C | 15.8°C | 16.6°C | +2.1°C |
| Avg Rain | 89 mm | 94 mm | 112 mm | 82 mm | 86 mm | -4 mm |
July temperatures in Saint-Lazare have risen by about 2.1°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 5.8°C (1982) to a record high of 36°C (2020).
Rainfall in July is a relatively wet time of year, averaging 93 mm, with a wettest year of 170 mm.
One of the best times to visit Saint-Lazare
July is one of the best times to visit Saint-Lazare. Expect days averaging 25.5°C and nights around 15.2°C (mean 20.4°C) — warmer than Saint-Lazare's yearly average — with higher rainfall (93 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 29.0°C | 23.0°C | 17.0°C | 34.6°C | 10.2°C | 54 mm | 67% | 0.8 m/s | 5.9 |
| 2024 | 27.8°C | 22.3°C | 16.9°C | 32.1°C | 11.6°C | 100 mm | 74% | 0.8 m/s | 5.8 |
| 2023 | 26.8°C | 21.9°C | 17.0°C | 32.4°C | 10.0°C | 132 mm | 78% | 0.7 m/s | 5.3 |
| 2022 | 26.3°C | 20.7°C | 15.2°C | 30.7°C | 8.8°C | 68 mm | 72% | 0.9 m/s | 6.1 |
| 2021 | 25.6°C | 20.4°C | 15.3°C | 30.7°C | 10.6°C | 89 mm | 71% | 0.8 m/s | 5.3 |
| 2020 🔥 | 29.5°C | 23.9°C | 18.3°C | 36.0°C | 14.6°C | 70 mm | 71% | 0.9 m/s | 6 |
| 2019 | 27.1°C | 21.8°C | 16.5°C | 31.9°C | 11.8°C | 56 mm | 78% | 0.8 m/s | 6.4 |
| 2018 | 27.8°C | 22.3°C | 16.9°C | 33.1°C | 10.6°C | 75 mm | 75% | 0.9 m/s | 6.6 |
| 2017 | 23.9°C | 19.6°C | 15.2°C | 28.2°C | 10.0°C | 124 mm | 83% | 0.9 m/s | 5.7 |
| 2016 | 26.2°C | 20.7°C | 15.3°C | 30.2°C | 11.1°C | 85 mm | 76% | 0.9 m/s | 5.9 |
| 2015 | 26.0°C | 20.4°C | 14.8°C | 32.6°C | 8.9°C | 89 mm | 76% | 0.9 m/s | 6 |
| 2014 | 23.7°C | 19.1°C | 14.5°C | 29.8°C | 10.8°C | 106 mm | 81% | 0.9 m/s | 5.4 |
| 2013 | 25.7°C | 20.7°C | 15.7°C | 30.3°C | 8.5°C | 73 mm | 79% | 0.8 m/s | 6 |
| 2012 | 27.9°C | 21.8°C | 15.7°C | 33.7°C | 10.9°C | 56 mm | 66% | 0.8 m/s | 6.5 |
| 2011 | 26.4°C | 21.4°C | 16.4°C | 31.5°C | 13.1°C | 71 mm | 79% | 0.8 m/s | 6.5 |
| 2010 | 27.0°C | 21.8°C | 16.7°C | 32.5°C | 9.9°C | 86 mm | 76% | 0.9 m/s | 6 |
| 2009 🌧️ | 22.6°C | 18.5°C | 14.5°C | 26.7°C | 8.3°C | 170 mm | 85% | 0.8 m/s | 4.9 |
| 2008 | 24.4°C | 19.8°C | 15.2°C | 28.8°C | 10.2°C | 118 mm | 83% | 0.8 m/s | 5.3 |
| 2007 | 23.8°C | 19.0°C | 14.2°C | 28.5°C | 8.0°C | 135 mm | 81% | 0.8 m/s | 5.6 |
| 2006 | 25.8°C | 21.0°C | 16.2°C | 29.4°C | 11.1°C | 116 mm | 83% | 0.9 m/s | 5.8 |
| 2005 | 25.8°C | 20.7°C | 15.7°C | 29.8°C | 10.0°C | 93 mm | 80% | 0.8 m/s | 6.1 |
| 2004 | 24.4°C | 19.9°C | 15.4°C | 28.7°C | 9.3°C | 137 mm | 82% | 0.8 m/s | 5.3 |
| 2003 | 24.8°C | 20.1°C | 15.3°C | 28.6°C | 11.8°C | 116 mm | 81% | 1 m/s | 5.4 |
| 2002 | 25.1°C | 20.2°C | 15.2°C | 31.2°C | 9.6°C | 82 mm | 81% | 1 m/s | 6.3 |
| 2001 | 24.2°C | 19.0°C | 13.8°C | 31.4°C | 7.3°C | 49 mm | 74% | 0.9 m/s | 5.9 |
| 2000 | 22.9°C | 18.4°C | 13.9°C | 26.9°C | 8.9°C | 101 mm | 81% | 0.9 m/s | 5.5 |
| 1999 | 27.4°C | 21.9°C | 16.3°C | 32.0°C | 11.0°C | 98 mm | 73% | 1 m/s | 6 |
| 1998 | 24.5°C | 19.8°C | 15.0°C | 29.5°C | 9.9°C | 100 mm | 79% | 0.9 m/s | 5.9 |
| 1997 | 24.8°C | 19.5°C | 14.1°C | 28.9°C | 9.6°C | 84 mm | 76% | 1 m/s | 6 |
| 1996 | 23.2°C | 18.7°C | 14.1°C | 26.9°C | 10.4°C | 134 mm | 82% | 1 m/s | 5.2 |
| 1995 | 27.1°C | 21.6°C | 16.0°C | 31.8°C | 10.1°C | 100 mm | 73% | 1 m/s | 5.4 |
| 1994 | 25.2°C | 20.4°C | 15.7°C | 29.1°C | 9.8°C | 74 mm | 83% | 0.8 m/s | 5.6 |
| 1993 | 25.6°C | 20.6°C | 15.6°C | 30.0°C | 10.1°C | 64 mm | 80% | 0.9 m/s | 5.7 |
| 1992 ❄️ | 22.0°C | 17.2°C | 12.4°C | 25.6°C | 6.7°C | 126 mm | 81% | 0.9 m/s | 5.9 |
| 1991 | 25.8°C | 20.2°C | 14.7°C | 31.5°C | 8.9°C | 61 mm | 73% | 0.9 m/s | 6.1 |
| 1990 | 24.6°C | 19.7°C | 14.8°C | 29.9°C | 8.5°C | 101 mm | 79% | 0.8 m/s | 5.9 |
| 1989 | 25.6°C | 20.0°C | 14.3°C | 30.8°C | 10.6°C | 55 mm | 77% | 0.8 m/s | 6.6 |
| 1988 | 26.5°C | 21.1°C | 15.7°C | 32.5°C | 8.8°C | 90 mm | 77% | 0.8 m/s | 5.6 |
| 1987 | 25.6°C | 20.4°C | 15.2°C | 31.2°C | 7.8°C | 134 mm | 79% | 0.9 m/s | 5.6 |
| 1986 | 23.3°C | 18.4°C | 13.6°C | 29.3°C | 8.4°C | 140 mm | 81% | 0.9 m/s | 5.7 |
| 1985 | 23.8°C | 18.6°C | 13.5°C | 28.6°C | 9.6°C | 105 mm | 79% | 0.9 m/s | 6.1 |
| 1984 | 24.5°C | 19.6°C | 14.6°C | 28.3°C | 10.3°C | 68 mm | 79% | 1 m/s | 5.1 |
| 1983 | 25.3°C | 19.9°C | 14.6°C | 29.3°C | 8.1°C | 69 mm | 79% | 0.9 m/s | — |
| 1982 | 25.3°C | 19.5°C | 13.8°C | 30.2°C | 5.8°C | 65 mm | 75% | 1 m/s | — |
| 1981 | 25.3°C | 20.2°C | 15.1°C | 29.6°C | 9.3°C | 78 mm | 79% | 0.9 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 25.5°C with lows near 15.2°C (mean 20.4°C), based on 45 years of NASA POWER data.
July averages 93 mm of rainfall in Saint-Lazare, a relatively wet time of year. The wettest on record was 170 mm in 2009.
The hottest July reached 36°C in 2020. The coldest dipped to 5.8°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.1°C. Daytime highs moved from 24.8°C to 27.1°C and overnight lows from 14.3°C to 16.3°C over the same span.
July is one of the warmer months of the year in Saint-Lazare and a relatively wet time of year, so plan for around 25.5°C daytime highs and 15.2°C at night.
Not quite — July is the 12th coolest month in Saint-Lazare, averaging 20.4°C.
For July in Saint-Lazare, pack light layers you can adjust through the day, with typical highs of 25.5°C and lows of 15.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 78% — quite humid.
Average wind speed in July is 0.9 m/s. The windiest July on record averaged 1 m/s (1982).
The wettest July on record was 2009 with 170 mm. On average, July sees 93 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Saint-Lazare behaves each July, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for July specifically, along with year-by-year records and how the month has changed over the decades.
