Photo: Graeme MacKay from Hamilton, Ontario, Canada · CC BY 2.0 · Wikimedia Commons
AncasterReport this photo · linked, not stored
AncasterReport this photo · linked, not stored
Climate guideThirty-year normals for Ancaster, Canada
Ancaster climate by month
Warm-summer humid continental · DfbBest May–Jun · Sep
Annual mean9°day and night
Seasonal swing27°warmest vs coolest
Precipitation1,006 mm162 wet days a year
43.22° N, 79.99° WElevation 253 mUTC−4 · Eastern Daylight Time
When to goAncaster · weather score
Best timeMay–Jun · Sep
October: high / low15° / 4°
iSummary
What the weather is like
Ancaster has a warm-summer humid continental climate (Köppen Dfb): warm summers, cold winters and precipitation in every season.
The warmest month is July, when afternoons average 28° and nights 15°. January is the coolest month, with highs of -1° and lows of -10°. The difference between the warmest and the coolest month is about 27°, a large swing typical of continental interiors.
About 1,006 mm of precipitation falls in an average year. October is the wettest month (81 mm, 16 wet days) and February the driest (68 mm, 11 wet days). Cloud cover ranges from 29% in July to 55% in January.
Compared with Ottawa, the capital, Ancaster is 1.5° warmer on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 28° · July
- Coldest nights
- -10° · January
- Wettest month
- October
- Driest month
- February
- Clearest skies
- July · 29% cloud
- Longest day
- 15 h 22 min
- Shortest day
- 9 h 00 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | -1° | 1° | 6° | 14° | 21° | 26° | 28° | 27° | 23° | 15° | 8° | 2° |
| Average low | -10° | -9° | -4° | 1° | 7° | 13° | 15° | 14° | 10° | 4° | -1° | -6° |
| Precipitation | 70 mm | 68 mm | 70 mm | 84 mm | 91 mm | 88 mm | 104 mm | 90 mm | 95 mm | 81 mm | 92 mm | 73 mm |
| Wet days (≥1 mm) | 14.2 | 10.5 | 11.2 | 12.5 | 12.3 | 14.7 | 14.7 | 15.2 | 10.8 | 15.7 | 14.2 | 15.7 |
| Cloud cover | 55% | 48% | 44% | 42% | 39% | 33% | 29% | 30% | 34% | 40% | 49% | 55% |
| Daylight | 9h 20 | 10h 32 | 11h 53 | 13h 24 | 14h 40 | 15h 22 | 15h 05 | 13h 58 | 12h 32 | 11h 04 | 9h 44 | 9h 00 |
| Month score | 15 | 26 | 26 | 46 | 67 | 61 | 53 | 59 | 73 | 49 | 17 | 15 |
ivMonth by month
Ancaster in every month
January15
-1° / -10°
70 mm · 14.2 wet days
February26
1° / -9°
68 mm · 10.5 wet days
March26
6° / -4°
70 mm · 11.2 wet days
April46
14° / 1°
84 mm · 12.5 wet days
May67
21° / 7°
91 mm · 12.3 wet days
June61
26° / 13°
88 mm · 14.7 wet days
July53
28° / 15°
104 mm · 14.7 wet days
August59
27° / 14°
90 mm · 15.2 wet days
September73
23° / 10°
95 mm · 10.8 wet days
October49
15° / 4°
81 mm · 15.7 wet days
November17
8° / -1°
92 mm · 14.2 wet days
December15
2° / -6°
73 mm · 15.7 wet days