July is one of the warmer months of the year in Saint John, with average highs near 23.1°C and lows around 13.5°C (mean 18.3°C). It is about average for rainfall, averaging 95 mm of rainfall and 85% relative humidity across the period.
July is one of the warmer months of the year in Saint John. Across 45 years of records, the warmest July in Saint John was 2023 — when the month averaged 20.5°C — while the coldest was 1992 at 15.8°C. Typical July days reach 23.1°C with nights near 13.5°C. The long-term trend is warming, about 0.4°C per decade.
July is about average for rainfall in Saint John, averaging 95 mm of rainfall. The wettest July on record was 2014 with 173 mm, while the driest was 1987 at 37 mm.
Relative humidity in Saint John during July averages 85%. The most humid July was 2023 at 88%, and the least humid was 2012 at 82%.
July receives about 5.5 kWh/m²/day of solar energy in Saint John. The sunniest Julys were 1997, 2018 and 2022 at 6.3 kWh/m²/day, and the cloudiest was 2009 at 4.5.
Average wind speed in Saint John during July is 0.4 m/s. The windiest Julys were 1997, 2014 and 2022, among others at 0.5 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.8°C | 18.2°C | 18.0°C | 18.8°C | 19.2°C | +1.4°C |
| Avg High | 22.6°C | 23.0°C | 22.8°C | 23.7°C | 23.9°C | +1.3°C |
| Avg Low | 12.9°C | 13.4°C | 13.2°C | 14.0°C | 14.5°C | +1.6°C |
| Avg Rain | 93 mm | 89 mm | 99 mm | 92 mm | 104 mm | +11 mm |
July temperatures in Saint John have risen by about 1.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 6.8°C (1993) to a record high of 30.6°C (2020).
Rainfall in July is about average for rainfall, averaging 95 mm, with a wettest year of 173 mm.
One of the best times to visit Saint John
July is one of the best times to visit Saint John. Expect days averaging 23.1°C and nights around 13.5°C (mean 18.3°C) — warmer than Saint John's yearly average — with higher rainfall (95 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 | 23.8°C | 19.0°C | 14.2°C | 28.3°C | 10.6°C | 51 mm | 84% | 0.4 m/s | 5.8 |
| 2024 | 24.7°C | 19.9°C | 15.0°C | 29.4°C | 12.2°C | 79 mm | 86% | 0.4 m/s | 5.4 |
| 2023 🔥 | 25.0°C | 20.5°C | 16.1°C | 29.5°C | 13.0°C | 171 mm | 88% | 0.4 m/s | 5.3 |
| 2022 | 24.2°C | 19.3°C | 14.4°C | 28.4°C | 9.2°C | 85 mm | 83% | 0.5 m/s | 6.3 |
| 2021 | 21.9°C | 17.5°C | 13.1°C | 26.9°C | 10.0°C | 158 mm | 85% | 0.4 m/s | 4.6 |
| 2020 | 23.9°C | 19.0°C | 14.2°C | 30.6°C | 9.6°C | 81 mm | 86% | 0.4 m/s | 5.2 |
| 2019 | 24.0°C | 18.8°C | 13.7°C | 30.0°C | 10.5°C | 70 mm | 83% | 0.4 m/s | 6.2 |
| 2018 | 24.7°C | 19.6°C | 14.5°C | 30.1°C | 10.3°C | 57 mm | 84% | 0.4 m/s | 6.3 |
| 2017 | 22.8°C | 17.9°C | 13.0°C | 27.0°C | 9.4°C | 46 mm | 83% | 0.4 m/s | 6 |
| 2016 | 23.2°C | 18.6°C | 14.0°C | 27.7°C | 9.4°C | 77 mm | 85% | 0.4 m/s | 5.7 |
| 2015 | 22.8°C | 17.8°C | 12.8°C | 26.6°C | 8.7°C | 51 mm | 84% | 0.4 m/s | 5.6 |
| 2014 🌧️ | 23.6°C | 18.8°C | 14.1°C | 27.0°C | 10.7°C | 173 mm | 86% | 0.5 m/s | 5.6 |
| 2013 | 24.2°C | 19.7°C | 15.1°C | 30.1°C | 12.0°C | 172 mm | 85% | 0.4 m/s | 5.5 |
| 2012 | 24.1°C | 19.2°C | 14.3°C | 28.6°C | 11.3°C | 48 mm | 82% | 0.4 m/s | 6 |
| 2011 | 23.1°C | 18.4°C | 13.8°C | 26.9°C | 11.2°C | 142 mm | 85% | 0.4 m/s | 5.7 |
| 2010 | 24.1°C | 19.4°C | 14.6°C | 28.8°C | 9.9°C | 84 mm | 84% | 0.4 m/s | 5.8 |
| 2009 | 21.8°C | 17.5°C | 13.2°C | 25.9°C | 8.7°C | 146 mm | 87% | 0.4 m/s | 4.5 |
| 2008 | 24.1°C | 19.1°C | 14.0°C | 27.1°C | 10.8°C | 87 mm | 85% | 0.4 m/s | 5.6 |
| 2007 | 22.8°C | 18.0°C | 13.2°C | 29.5°C | 8.8°C | 90 mm | 85% | 0.4 m/s | 5.5 |
| 2006 | 24.0°C | 19.2°C | 14.4°C | 27.9°C | 11.3°C | 108 mm | 86% | 0.4 m/s | 5.6 |
| 2005 | 22.5°C | 17.5°C | 12.5°C | 29.1°C | 8.9°C | 100 mm | 85% | 0.4 m/s | 5.7 |
| 2004 | 22.5°C | 17.7°C | 12.9°C | 28.8°C | 9.4°C | 89 mm | 87% | 0.4 m/s | 4.8 |
| 2003 | 22.9°C | 18.3°C | 13.6°C | 26.6°C | 11.2°C | 76 mm | 85% | 0.4 m/s | 5.2 |
| 2002 | 22.7°C | 17.9°C | 13.0°C | 29.6°C | 9.3°C | 147 mm | 85% | 0.4 m/s | 5.4 |
| 2001 | 22.1°C | 17.3°C | 12.5°C | 27.3°C | 9.0°C | 55 mm | 84% | 0.4 m/s | 5.5 |
| 2000 | 22.3°C | 17.5°C | 12.7°C | 26.4°C | 9.5°C | 92 mm | 84% | 0.4 m/s | 5.3 |
| 1999 | 24.1°C | 19.3°C | 14.5°C | 29.3°C | 10.2°C | 80 mm | 84% | 0.4 m/s | 5.5 |
| 1998 | 23.3°C | 18.5°C | 13.6°C | 27.3°C | 11.0°C | 53 mm | 84% | 0.4 m/s | 5.8 |
| 1997 | 23.5°C | 18.1°C | 12.8°C | 28.2°C | 8.8°C | 70 mm | 82% | 0.5 m/s | 6.3 |
| 1996 | 21.3°C | 16.9°C | 12.6°C | 25.3°C | 9.7°C | 173 mm | 87% | 0.5 m/s | 4.8 |
| 1995 | 23.8°C | 18.9°C | 14.0°C | 28.1°C | 11.3°C | 93 mm | 85% | 0.4 m/s | 5.3 |
| 1994 | 24.6°C | 19.9°C | 15.2°C | 27.6°C | 11.1°C | 52 mm | 85% | 0.5 m/s | 5.8 |
| 1993 | 22.5°C | 17.6°C | 12.6°C | 29.4°C | 6.8°C | 70 mm | 85% | 0.4 m/s | 5.6 |
| 1992 ❄️ | 20.7°C | 15.8°C | 11.0°C | 24.5°C | 7.6°C | 111 mm | 84% | 0.5 m/s | 6.1 |
| 1991 | 22.7°C | 18.1°C | 13.4°C | 29.2°C | 8.6°C | 76 mm | 83% | 0.4 m/s | 5.7 |
| 1990 | 23.4°C | 18.7°C | 14.0°C | 28.2°C | 8.3°C | 111 mm | 84% | 0.4 m/s | 5.4 |
| 1989 | 22.6°C | 17.5°C | 12.4°C | 26.8°C | 9.1°C | 78 mm | 83% | 0.5 m/s | 5.8 |
| 1988 | 23.2°C | 18.4°C | 13.7°C | 26.7°C | 8.2°C | 102 mm | 87% | 0.4 m/s | 4.7 |
| 1987 | 22.7°C | 17.8°C | 12.8°C | 26.9°C | 8.5°C | 37 mm | 83% | 0.4 m/s | 5 |
| 1986 | 20.9°C | 16.3°C | 11.8°C | 26.2°C | 8.6°C | 98 mm | 86% | 0.4 m/s | 4.8 |
| 1985 | 23.0°C | 17.8°C | 12.5°C | 25.7°C | 10.0°C | 54 mm | 84% | 0.5 m/s | 6 |
| 1984 | 23.1°C | 18.6°C | 14.0°C | 28.3°C | 10.3°C | 134 mm | 86% | 0.5 m/s | 5.6 |
| 1983 | 22.5°C | 17.8°C | 13.1°C | 26.8°C | 8.5°C | 105 mm | 84% | 0.5 m/s | — |
| 1982 | 23.0°C | 17.9°C | 12.9°C | 27.2°C | 7.1°C | 113 mm | 83% | 0.5 m/s | — |
| 1981 | 22.4°C | 17.9°C | 13.3°C | 26.7°C | 10.5°C | 119 mm | 85% | 0.5 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 23.1°C with lows near 13.5°C (mean 18.3°C), based on 45 years of NASA POWER data.
July averages 95 mm of rainfall in Saint John, about average for rainfall. The wettest on record was 173 mm in 2014.
The hottest July reached 30.6°C in 2020. The coldest dipped to 6.8°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.2°C. Daytime highs moved from 22.8°C to 23.9°C and overnight lows from 13.2°C to 14.6°C over the same span.
July is one of the warmer months of the year in Saint John and about average for rainfall, so plan for around 23.1°C daytime highs and 13.5°C at night.
Not quite — July is the 12th coolest month in Saint John, averaging 18.3°C.
For July in Saint John, pack light layers you can adjust through the day, with typical highs of 23.1°C and lows of 13.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 85% — quite humid.
Average wind speed in July is 0.4 m/s. The windiest July on record averaged 0.5 m/s (1981).
The wettest July on record was 2014 with 173 mm. On average, July sees 95 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 John 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.
