Weather on October 21 in Ottawa

Historical weather data for October 21 in Ottawa, Canada

Avg High12°C (53°F)
Avg Low3°C (38°F)
Warmest197920°C
Coldest19741°C

Based on 54 years of data from OTTAWA CDA

About This Date

October 21st in Ottawa, Canada typically brings cool fall weather, with average highs around 12°C and lows near 3°C. Over 54 years of records, the warmest October 21st was in 1979 (20°C average), while the coldest was 1974 (1°C) — a 34°F range across recorded history. Precipitation has occurred on 46% of recorded October 21st dates, with snow falling 6% of the time (heaviest snowfall: 3.7"). The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.

The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.

Planning for October 21st in Ottawa? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecip
202514°C (57°F)8°C (47°F)--
202314°C (57°F)10°C (50°F)0.66"
202214°C (57°F)-1°C (31°F)0"
202116°C (61°F)10°C (50°F)1.56"
202016°C (60°F)3°C (38°F)1.18"
201916°C (61°F)1°C (33°F)0"
20184°C (39°F)-1°C (31°F)0"
201722°C (72°F)6°C (42°F)0"
201610°C (50°F)6°C (42°F)2.27"
201511°C (52°F)3°C (37°F)0.07"
20148°C (46°F)4°C (40°F)--
201314°C (57°F)1°C (33°F)0.36"
201213°C (55°F)8°C (46°F)0"
201112°C (54°F)8°C (46°F)0.32"
20108°C (46°F)4°C (40°F)0"
20099°C (49°F)7°C (45°F)0.66"
20088°C (47°F)5°C (41°F)0.22"
200722°C (72°F)8°C (47°F)0"
20067°C (45°F)2°C (36°F)0"
20059°C (49°F)-2°C (29°F)0"
20049°C (48°F)3°C (37°F)0"
2003--3°C (37°F)0.12"
20028°C (46°F)1°C (34°F)0"
200112°C (54°F)6°C (42°F)0.2"
200016°C (61°F)3°C (37°F)0"
199913°C (56°F)1°C (33°F)0.02"
19988°C (47°F)1°C (34°F)0"
19976°C (43°F)-1°C (31°F)0.86"
19968°C (46°F)6°C (43°F)1.24"
199517°C (62°F)11°C (51°F)5.39"
199418°C (64°F)11°C (51°F)0"
199317°C (63°F)8°C (46°F)0"
19926°C (43°F)1°C (33°F)0"
199110°C (50°F)1°C (33°F)0.1"
199017°C (63°F)-1°C (30°F)0"
19896°C (42°F)3°C (37°F)0.18"
198812°C (53°F)-2°C (28°F)0.4"
19878°C (46°F)3°C (37°F)0.02"
198613°C (56°F)5°C (41°F)0"
198512°C (54°F)-1°C (31°F)0"
198413°C (55°F)8°C (47°F)0.3"
19838°C (46°F)-3°C (27°F)0"
19828°C (46°F)4°C (40°F)0"
19817°C (44°F)3°C (38°F)0.5"
19808°C (46°F)-1°C (30°F)0.12"
197924°C (76°F)15°C (59°F)0"
197819°C (66°F)4°C (39°F)0"
197718°C (65°F)1°C (34°F)0.72"
19767°C (45°F)2°C (35°F)0.08"
197517°C (62°F)8°C (47°F)0"
19746°C (43°F)-4°C (25°F)0"
197311°C (52°F)-1°C (30°F)0"
19728°C (47°F)-1°C (30°F)0.28"
197114°C (57°F)6°C (42°F)0"

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