@YOW_Weather

Rolf Campbell: Weather historian and forecaster. I gather statistics from Environment Canada and across the web to generate alerts & forecasts.

 Ottawa, Ontario, Canada
buymeacoffee.com/RolfCampbell
Joined October 2013
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My pay forecasts will stop your guessing. DM me for details.
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Yesterday was #Ottawa's first -2°C of the season. Typical first is October 19. Record earliest is Sep 20, 1929; latest Nov 24, 1963. #YowWx #OttWeather
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678
Yesterday between 8am➜noon, the temp jumped from -0.5°C➜13.2°C which was #Ottawa's largest 4-hour jump since Mar 3rd, 2025 #YowWx #OttWeather
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745
Yesterday's low of -2.2°C was the lowest temperature #Ottawa has recorded since Apr 21st. #YowWx #OttWeather
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671
Today is #Ottawa's first -1°C of the season. Typical first is October 13. Record earliest is Sep 14, 1911/1935; latest Nov 12, 1998. #YowWx #OttWeather
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902
Today's ~6am temperature (-1.6°C) was #Ottawa's coldest temperature since Apr 24th. #YowWx #OttWeather
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Tomorrow's forecast low of -3°C could be the lowest temperature #Ottawa has recorded since Apr 21st. #YowWx #OttWeather
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Tomorrow's forecast low of -2°C could be the lowest temperature #Ottawa has recorded since Apr 24th. #YowWx #OttWeather
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632
With a high of just 6.4°C, yesterday was #Ottawa's coldest day since Apr 20th. #YowWx #OttWeather
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1,007
Today's 17.4mm of rain brought #Ottawa just 77.4mm from 1st place for most rain year-to-date Oct 16. #YowWx #OttWeather
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695
#Ottawa's total rain so far this year is 892.6 mm, 277 mm above the October 16 median of 615.5 mm #YowWx #OttWeather
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1,135
#Ottawa's in 2nd place for most rain year-to-date Oct 16. #YowWx #OttWeather
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572
Near record rain. 24.2mm of rain brought #Ottawa within 2.7 mm of the most rain recorded on Oct 13th. #YowWx #OttWeather
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With a min humidity of 91%, yesterday was #Ottawa's moistest day since Jun 14th. #YowWx #OttWeather
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Near record rain. 20.6mm of rain brought #Ottawa within 6.3 mm of the most rain recorded on Oct 13th. #YowWx #OttWeather
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995
Historically, today is #Ottawa's last day of the year with a median high temperature ≥ 15°C. #YowWx #OttWeather
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Yesterday between 9am➜noon, the temp jumped from 6.9°C➜17.8°C which was #Ottawa's largest 3-hour jump since Mar 3rd, 2025 #YowWx #OttWeather
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1,158
Yesterday between 8am➜noon, the temp jumped from 4.4°C➜17.8°C which was #Ottawa's largest 4-hour jump since Mar 3rd, 2025 #YowWx #OttWeather
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1,048
Today is #Ottawa's first #frost of the season. Typical first is October 10. Record earliest is Sep 6, 1888; latest Oct 27, 2011. #YowWx #OttWeather
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🥉With a mean wind of 24km/h, yesterday was #Ottawa's windiest Oct 5th in 60 years, since 1966. #YowWx #OttWeather #YOW #OttNews #ONWx
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With a mean wind of 23.5km/h, yesterday was #Ottawa's windiest day since Jun 19th. #YowWx #OttWeather
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