Climate averages 1991–2020

Whitby weather
in July.

A warm, moderately wet month: the warmest and the 11th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 25.3°C Daytime mean, July

Average low 18.2°C Night-time mean, July

Rainfall 87 mm 11 days with ≥1 mm

Daylight 15 h Sunrise to sunset, per day

July is a warm month in Whitby: daytime highs average 25.3°C and nights cool to about 18.2°C. By daytime temperature it is the warmest month of the year.

Expect about 87 mm of rain on roughly 11 days, which makes July a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 07 min on an average July day.

The nearest other city in this atlas is Oshawa (7 km away). In July its highs average 25.1°C, about as warm as Whitby, with 84 mm of rain.

Among the 86 cities listed in Canada, Whitby ranks joint 42nd of 86 for the warmest July highs and joint 52nd of 86 for the driest July (rainfall, lowest first). The mean July high of those 86 cities is 24.4°C; Whitby is 0.9°C warmer than that mean.

From July to August, average highs fall by 0.5°C to 24.8°C, and monthly rainfall falls from 87 mm to 85 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly precipitation

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Whitby climate table

1991–2020

Monthly climate averages for Whitby, 1991–2020
Month	Average highHigh / low	Average low	Precipitation mm/month	Wet days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	-1.5°C-8.5°C	-8.5°C	64	10.6	9.39 h
February	-1.0°C-8.8°C	-8.8°C	52	8.3	10.410 h
March	3.4°C-4.1°C	-4.1°C	61	10.3	11.912 h
April	9.9°C2.3°C	2.3°C	84	11.5	13.413 h
May	16.4°C8.8°C	8.8°C	80	11.2	14.715 h
June	22.0°C14.8°C	14.8°C	93	11.4	15.415 h
July, selected	25.3°C18.2°C	18.2°C	87	11.1	15.115 h
August	24.8°C18.0°C	18.0°C	85	10.1	14.014 h
September	21.0°C14.5°C	14.5°C	80	9.4	12.613 h
October	14.0°C8.2°C	8.2°C	83	11.4	11.011 h
November	7.2°C1.9°C	1.9°C	73	10.6	9.710 h
December	1.8°C-3.8°C	-3.8°C	65	10.7	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

July in nearby cities

Distance from Whitby

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 limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Whitby) is explained once on the Whitby year overview and on the Sources, method and limits page.