Photo: Hayden Soloviev · CC BY 4.0Wet weather: 1,138 mm of rain and snow a year falls on Lyster, more than on 84% of Canadian towns
The warmest part of a July day comes in at 25.5°C on average. A year here swings 42°C from midwinter lows to midsummer highs. Winter nights are cold: in January they are colder than in 81% of Canadian towns. Warm coats and heating bills mark the months from October to April, when means dip under 10°C.
These are not Lyster’s own readings: ECCC keeps no normals there, so the page uses Fortierville, 35 km west.
A year in Lyster at a glance
Each month’s typical high and low, in °C.
What stands out about Lyster’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Lyster feels like
Each season’s and each month’s usual high and low, 1991–2020.
175 frost days and 107 days above 20°C a year
The frost season runs September to May, and January freezes nearly every night. Some 29 nights a year drop under −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
1,138 mm of precipitation in a typical year
July is the wettest month and February the driest. About 141 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 253 cm of snow a year
The snow season runs October to April; December 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 Lyster
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A heating degree day is one degree of shortfall below 18°C for one day, summed over the year. In heating terms, homes need more heating than 61% of Canadian towns.
Living with Lyster’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
The outdoor season by the averages is Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Extremes don’t show in averages: floods, wildfire smoke and ice storms are on Lyster’s hazards page.
Flood & hazards →ECCC’s normals location: Fortierville
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Fortierville.
| Distance from the town | 35 km west |
| Station altitude | 53 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −41.0°C |
| Hottest reading, 1991–2020 | 35.9°C |
| Next-nearest location | Thetford Mines, 37 km |
How Lyster compares
Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in Quebec.
Nearby towns’ climate
Places around Lyster whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Lyster Fortierville | 25.5°C | −16.9°C | 1,138 mm |
| Laurierville 11 km · Thetford Mines | 23.5°C 2.0°C cooler | −16.1°C 0.8°C milder | 1,324 mm |
| Val-Alain 12 km · Fortierville | 25.5°C about the same | −16.9°C about the same | 1,138 mm |
| Saint-Flavien 15 km · Québec Jean Lesage (Airport) | 25.0°C 0.5°C cooler | −16.7°C about the same | 1,173 mm |
| Sainte-Agathe-de-Lotbinière 16 km · Scott | 25.1°C about the same | −16.5°C about the same | 1,182 mm |
Lyster 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 | −6.9°C | −16.9°C | −12.0°C | 81 mm | 56 cm |
| February | −4.9°C | −15.9°C | −10.5°C | 69 mm | 55 cm |
| March | 1.2°C | −9.0°C | −4.0°C | 79 mm | 47 cm |
| April | 9.5°C | −1.0°C | 4.4°C | 94 mm | 15 cm |
| May | 18.4°C | 5.8°C | 12.1°C | 92 mm | 1 cm |
| June | 23.3°C | 11.1°C | 17.2°C | 108 mm | 0 cm |
| July | 25.5°C | 14.0°C | 19.6°C | 133 mm | 0 cm |
| August | 24.5°C | 12.9°C | 18.6°C | 103 mm | 0 cm |
| September | 20.0°C | 8.3°C | 14.2°C | 95 mm | 0 cm |
| October | 12.1°C | 2.5°C | 7.4°C | 105 mm | 3 cm |
| November | 4.6°C | −3.2°C | 0.9°C | 82 mm | 19 cm |
| December | −2.9°C | −10.9°C | −6.9°C | 100 mm | 59 cm |
| Year | 10.4°C | −0.2°C | 5.1°C | 1,138 mm | 253 cm |
January varies most from one year to the next (3.2°C), June least
The thirty-year records stretch furthest in March: a low of −32.0°C in 1995 and a high of 23.5°C in 2012.
Where Lyster’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Fortierville, its nearest location with complete temperatures.
- Comparisons: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
- 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 Lyster’s climate
How warm does Lyster get in summer?
Midsummer means July, with afternoons near 25.5°C on a typical day.
How cold does Lyster get in winter?
Overnight lows average −16.9°C in January, the coldest month.
How much rain and snow does Lyster get?
The yearly total is about 1,138 mm. July gets 133 mm, the most of any month; February gets 69 mm, the least.
How long does snow stay on the ground?
Snow cover of 1 cm or more lasts about 134 days in a typical year.
Are these figures for Lyster itself?
They are the closest available: the normals for Fortierville, since Lyster has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Lyster →
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).