Afternoon heat in Munster - Ashton beats that of 86% of Canadian towns
The coldest hours of a January night bottom out at −14.3°C on average. In January, nights here are colder than in 61% of Canadian towns. Some 41°C separates winter nights from summer afternoons. Plan for rain or snow on about 118 days a year, the days with 1 mm or more.
These are not Munster - Ashton’s own readings: ECCC keeps no normals there, so the page uses Ottawa (Airport), 26 km north-east.
A year in Munster - Ashton at a glance
Each month’s typical high and low, in °C.
What stands out about Munster - Ashton’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Munster - Ashton feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 154 days, 20°C on 120
The frost season runs October to April, and January freezes nearly every night. On about 16 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
930 mm of precipitation in a typical year
June is the wettest month and February the driest.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 232 cm of snow a year
The snow season runs October to April; January brings the most, about 59 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Munster - Ashton
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Each day the mean sits under 18°C adds its shortfall; a year’s total is its heating degree days.
Living with Munster - Ashton’s climate
What the normals mean for a garden, a day outside and the depth of winter.
On average the last spring frost comes around 29 April and the first autumn frost around 7 October: about 160 frost-free days between.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul, Aug and Sep.
Parks & trails →Wind chill falls below −20 on about 47 days a year: cover skin and dress in layers.
Count on some 49 humid days a year with the humidex past 30.
A normal year has no blizzard, flood or heat wave in it; Munster - Ashton’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Ottawa (Airport)
Behind the 1991–2020 normals for Ottawa (Airport) are 2 stations, which ECCC combines into one record.
| Distance from the town | 26 km north-east |
| Station altitude | 114 m |
| Completeness | at least 25 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −33.1°C |
| Hottest reading, 1991–2020 | 36.9°C |
| Average wind | 13.5 km/h on average, most often from the west |
| Next-nearest location | Kemptville, 26 km |
How Munster - Ashton 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
Nearby places read from a different ECCC location (places on Munster - Ashton’s own would show the same figures).
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Munster - Ashton Ottawa (Airport) | 27.0°C | −14.3°C | 930 mm |
| Richmond 7.1 km · Ottawa (Airport) | 27.0°C about the same | −14.3°C about the same | 930 mm |
| Stittsville East 14 km · Ottawa (City) | 26.7°C about the same | −14.0°C about the same | 938 mm |
| North Gower - Kars 15 km · Kemptville | 26.8°C about the same | −14.0°C about the same | 925 mm |
Munster - Ashton 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 | −5.5°C | −14.3°C | −10.0°C | 70 mm | 59 cm |
| February | −3.6°C | −13.2°C | −8.5°C | 50 mm | 49 cm |
| March | 2.4°C | −7.1°C | −2.4°C | 66 mm | 39 cm |
| April | 11.3°C | 0.5°C | 5.9°C | 81 mm | 12 cm |
| May | 19.6°C | 7.5°C | 13.6°C | 75 mm | under 1 cm |
| June | 24.4°C | 12.9°C | 18.7°C | 97 mm | 0 cm |
| July | 27.0°C | 15.4°C | 21.2°C | 89 mm | 0 cm |
| August | 25.8°C | 14.3°C | 20.1°C | 79 mm | 0 cm |
| September | 21.0°C | 9.6°C | 15.3°C | 90 mm | 0 cm |
| October | 13.0°C | 3.4°C | 8.2°C | 87 mm | 3 cm |
| November | 5.8°C | −2.4°C | 1.7°C | 74 mm | 21 cm |
| December | −1.9°C | −9.6°C | −5.8°C | 72 mm | 50 cm |
| Year | 11.6°C | 1.4°C | 6.5°C | 930 mm | 232 cm |
March has run from −29.0°C to 27.4°C in thirty years
Year to year, January varies most (a standard deviation of 3.2°C around −10.0°C) and August least (1.1°C).
Where Munster - Ashton’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Ottawa (Airport), 1991–2020.
- Comparisons: the towns and neighbourhoods of 2,500+ across Canada, each on its nearest normals location, without the city totals or the reserves.
- Not on this page: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Munster - Ashton’s climate
How warm does Munster - Ashton get in summer?
At its warmest, in July, the normal high is 27.0°C.
How cold does Munster - Ashton get in winter?
The coldest nights come in January, averaging −14.3°C.
How much rain and snow does Munster - Ashton get?
The yearly total is about 930 mm. June gets 97 mm, the most of any month; February gets 50 mm, the least.
How long does snow stay on the ground?
Roughly 118 days a year start with snow cover of 1 cm or more.
Are these figures for Munster - Ashton itself?
They come from Ottawa (Airport), which ECCC uses as the nearest normals location for Munster - Ashton.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Munster - Ashton →
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).