Climate averages 1991–2020
Moncton weather
in May.
A mild, moderately wet month: the 5th warmest and the joint 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Moncton: daytime highs average 15.3°C and nights cool to about 5.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 85 mm of rain on roughly 13 days, which makes May a moderately wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 56 min on an average May day.
The nearest other city in this atlas is Saint John (134 km away). In May its highs average 13.4°C, 1.9°C cooler than Moncton, with 104 mm of rain.
Among the 86 cities listed in Canada, Moncton ranks 77th of 86 for the warmest May highs and joint 46th of 86 for the driest May (rainfall, lowest first). The mean May high of those 86 cities is 17.0°C; Moncton is 1.7°C cooler than that mean.
From May to June, average highs rise by 5.2°C to 20.5°C, and monthly rainfall rises from 85 mm to 91 mm.
The annual picture
May in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Moncton climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -3.5°C-12.8°C | -12.8°C | 93 | 11.4 | 9.19 h |
| February | -2.5°C-11.8°C | -11.8°C | 83 | 10.1 | 10.310 h |
| March | 1.8°C-6.9°C | -6.9°C | 98 | 11.5 | 11.912 h |
| April | 8.2°C-0.5°C | -0.5°C | 85 | 12.5 | 13.514 h |
| May, selected | 15.3°C5.7°C | 5.7°C | 85 | 12.5 | 14.915 h |
| June | 20.5°C11.5°C | 11.5°C | 91 | 11.8 | 15.716 h |
| July | 24.1°C15.6°C | 15.6°C | 82 | 11.5 | 15.415 h |
| August | 23.6°C15.4°C | 15.4°C | 76 | 9.8 | 14.214 h |
| September | 19.4°C11.4°C | 11.4°C | 93 | 9.3 | 12.613 h |
| October | 12.6°C5.5°C | 5.5°C | 98 | 10.7 | 11.011 h |
| November | 5.9°C-0.4°C | -0.4°C | 98 | 10.7 | 9.510 h |
| December | -0.1°C-7.5°C | -7.5°C | 112 | 12.2 | 8.79 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Saint John in MayCanada · 134 kmHigh 13.4°C · Low 6.1°C · 104 mm rain
- Dartmouth in MayCanada · 185 kmHigh 13.6°C · Low 6.0°C · 83 mm rain
- Halifax in MayCanada · 187 kmHigh 12.0°C · Low 5.8°C · 83 mm rain
- Sydney, Canada in MayCanada · 356 kmHigh 11.5°C · Low 4.7°C · 86 mm rain
- Québec in MayCanada · 498 kmHigh 17.1°C · Low 6.7°C · 101 mm rain
- Saguenay in MayCanada · 539 kmHigh 15.2°C · Low 4.0°C · 92 mm rain
- Sherbrooke in MayCanada · 556 kmHigh 17.3°C · Low 7.0°C · 117 mm rain
- Trois-Rivières in MayCanada · 597 kmHigh 18.0°C · Low 8.0°C · 96 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Moncton) is explained once on the Moncton year overview and on the Sources, method and limits page.