Climate averages 1991–2020
Waterloo weather
in April.
A cool, moderately wet month: the 7th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Waterloo: daytime highs average 11.1°C and nights cool to about 0.8°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 86 mm of rain on roughly 12 days, which makes April a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 23 min on an average April day.
The nearest other city in this atlas is Kitchener (5 km away). In April its highs average 11.2°C, about as warm as Waterloo, with 86 mm of rain.
Among the 86 cities listed in Canada, Waterloo ranks joint 26th of 86 for the warmest April highs and joint 34th of 86 for the driest April (rainfall, lowest first). The mean April high of those 86 cities is 10.3°C; Waterloo is 0.8°C warmer than that mean.
From April to May, average highs rise by 7.2°C to 18.3°C, and monthly rainfall rises from 86 mm to 88 mm.
The annual picture
April 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
Waterloo climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -2.4°C-10.4°C | -10.4°C | 68 | 11.5 | 9.49 h |
| February | -1.4°C-10.9°C | -10.9°C | 55 | 9.2 | 10.510 h |
| March | 4.0°C-5.8°C | -5.8°C | 63 | 10.0 | 11.912 h |
| April, selected | 11.1°C0.8°C | 0.8°C | 86 | 11.8 | 13.413 h |
| May | 18.3°C7.8°C | 7.8°C | 88 | 11.6 | 14.715 h |
| June | 23.2°C13.5°C | 13.5°C | 94 | 11.4 | 15.415 h |
| July | 25.4°C16.1°C | 16.1°C | 85 | 11.0 | 15.115 h |
| August | 24.4°C15.5°C | 15.5°C | 76 | 9.9 | 14.014 h |
| September | 20.6°C11.9°C | 11.9°C | 79 | 9.5 | 12.613 h |
| October | 13.4°C5.7°C | 5.7°C | 80 | 11.3 | 11.111 h |
| November | 6.3°C-0.4°C | -0.4°C | 74 | 11.2 | 9.710 h |
| December | 0.6°C-5.8°C | -5.8°C | 65 | 11.5 | 9.09 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
April in nearby cities
- Kitchener in AprilCanada · 5 kmHigh 11.2°C · Low 0.7°C · 86 mm rain
- Cambridge, Canada in AprilCanada · 20 kmHigh 11.6°C · Low 1.4°C · 87 mm rain
- Guelph in AprilCanada · 23 kmHigh 11.1°C · Low 0.9°C · 87 mm rain
- Brantford in AprilCanada · 42 kmHigh 12.2°C · Low 1.9°C · 87 mm rain
- Milton in AprilCanada · 51 kmHigh 11.4°C · Low 2.1°C · 84 mm rain
- Burlington in AprilCanada · 56 kmHigh 10.6°C · Low 2.3°C · 89 mm rain
- Hamilton in AprilCanada · 59 kmHigh 9.8°C · Low 2.7°C · 94 mm rain
- Caledon in AprilCanada · 61 kmHigh 10.1°C · Low 0.2°C · 83 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 Waterloo) is explained once on the Waterloo year overview and on the Sources, method and limits page.
Kitchener lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.