Moncton weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Fair
Best time to visit: July – August
What is the weather like in Moncton in August?
In August, Moncton is warm: daytime highs average 24 °C, and nights cool down to about 16 °C. The sea averages 18.7 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7 hours a day. Rain is frequent, with about 10 rainy days and 80 mm in total. All in all, August is a so-so month for a holiday in Moncton.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 55 | 58 | 28 |
| Day | 24° | 24° | 20° |
| Night | 16° | 16° | 12° |
| Sea | 17° | 19° | 17° |
| Sun | 7 h | 7 h | 6 h |
| Rain days | 12 | 10 | 9 |
More details for August
- Daylight
- 14 h 13 min06:17 – 20:31
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 5 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 59 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−3America/Moncton
How the score comes together
- Temperatureweight 35 %78 %
- Seaweight 25 %24 %
- Sunshineweight 20 %65 %
- Few rainy daysweight 20 %58 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in August
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Moncton in August: quick answers
Is Moncton hot in August?
Warm rather than hot: in August, daytime highs in Moncton average 24 °C and nights cool to about 16 °C.
Can you swim in Moncton in August?
Only if you don't mind cold water: in August the sea averages just 18.7 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Moncton in August?
Rain is frequent, with about 10 rainy days and 80 mm in total.
Moncton month by month
The whole year in MonctonAll destinations: CanadaWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences