Frosty mornings in Annex are scarcer than in 89% of Canadian towns
In July the day’s top temperature is typically 27.0°C. A year here swings 34°C from midwinter lows to midsummer highs. Summer afternoons here are warmer than in 86% of Canadian towns. Wet days, with 1 mm of rain or snow or more, come about 104 times a year.
Measured at Toronto (City), 0.2 km south-east: ECCC’s normals for 1991–2020.
A year in Annex at a glance
Each month’s typical high and low, in °C.
What stands out about Annex’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Annex feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on 101 days, 20°C on 124
Frost comes from November to April, most of all in January (about 26 nights). About 14 days a year top 30°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 823 mm a year
June brings the most rain and snow; March, the least.
Rain and snow by month
Millimetres
Snowfall: about 115 cm in a normal year
Snow falls from November to April, most of all in January (about 32 cm).
Snowfall by month
Centimetres
ECCC’s Toronto (City) normals leave snowfall out; the figures here come from Toronto Pearson (Airport), 18 km away.
Heating a home in Annex
94% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
One degree below 18°C for one day makes one heating degree day; the year’s days are added together. Over a year, a home here needs less heating than 90% of Canadian towns.
Living with Annex’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Plant out after about 11 April; the first frost of autumn usually arrives near 6 November, leaving roughly 208 days without frost.
Plan time outside for May, Jun, Jul, Aug and Sep: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →The air feels heavier than 30 on the humidex for about 59 days a year.
For blizzards, floods and wildfire, turn to Annex’s hazards page.
Flood & hazards →ECCC’s normals location: Toronto (City)
Toronto (City) is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 0.2 km south-east |
| Station altitude | 113 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Toronto Pearson (Airport), 18 km |
| Coldest reading, 1991–2020 | −25.9°C |
| Hottest reading, 1991–2020 | 38.2°C |
| Next-nearest location | Toronto (Island), 4.6 km |
How Annex compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Ontario.
Nearby towns’ climate
Places around Annex whose figures come from another normals location. The nearest places to Annex with figures are 21–29 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Annex Toronto (City) | 27.0°C | −6.7°C | 823 mm |
| Vaughan 21 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 3.4°C colder | 862 mm |
| Mississauga 23 km · Toronto Pearson (Airport) | 27.4°C about the same | −8.9°C 2.2°C colder | 807 mm |
Annex weather by month
Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −0.3°C | −6.7°C | −3.5°C | 65 mm | 32 cm |
| February | 0.6°C | −6.0°C | −2.7°C | 54 mm | 28 cm |
| March | 5.1°C | −1.8°C | 1.7°C | 53 mm | 17 cm |
| April | 11.7°C | 3.9°C | 7.8°C | 78 mm | 5 cm |
| May | 18.8°C | 10.0°C | 14.5°C | 76 mm | under 1 cm |
| June | 24.2°C | 15.3°C | 19.8°C | 82 mm | 0 cm |
| July | 27.0°C | 18.1°C | 22.5°C | 77 mm | 0 cm |
| August | 26.1°C | 17.7°C | 21.9°C | 72 mm | 0 cm |
| September | 22.0°C | 13.8°C | 17.9°C | 69 mm | 0 cm |
| October | 14.6°C | 7.7°C | 11.2°C | 69 mm | under 1 cm |
| November | 8.1°C | 2.3°C | 5.2°C | 71 mm | 9 cm |
| December | 2.6°C | −2.7°C | −0.1°C | 58 mm | 24 cm |
| Year | 13.4°C | 6.0°C | 9.7°C | 823 mm | 115 cm |
In March, anything from −23.1°C to 25.7°C
January is the least predictable month: about two years in three its average lands within 2.7°C of the normal, −3.5°C. June is the steadiest, within 1.2°C.
Where Annex’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Toronto (City) from ECCC’s climate data site, the nearest location with every month of temperature.
- Other locations: where a location publishes no full year of precipitation or snowfall, the nearest one that does supplies it, named beside those figures.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- Not on this page: sunshine, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Annex’s climate
How warm does Annex get in summer?
Peak warmth comes in July, at about 27.0°C by mid-afternoon.
How cold does Annex get in winter?
Lows sink to −6.7°C on an average January night.
How much rain and snow does Annex get?
Count on roughly 823 mm a year, heaviest in June (82 mm) and lightest in March (53 mm).
Are these figures for Annex itself?
Yes: ECCC’s 1991–2020 normals for Toronto (City), which is in Annex.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Annex →
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).