Nostr notes by Ottawa Weather Records

#Ottawa just had its wettest month since records began. Total ...

2026-08-02T12:19:07Z

#Ottawa just had its wettest month since records began. Total precipitation was 281.8 mm. #YowWx #OttWeather #YOW #OttNews #ONWx

🥇With a 2am rain total of 118.4mm, yesterday was #Ottawa's ...

2026-07-02T14:54:27Z

🥇With a 2am rain total of 118.4mm, yesterday was #Ottawa's wettest Jul 1st since records began in 1872. #YowWx #OttWeather #YOW #OttNews #ONWx

Today is the 2nd rainiest day on record in #Ottawa: 111.4mm. ...

2026-07-02T00:49:49Z

Today is the 2nd rainiest day on record in #Ottawa: 111.4mm. #YowWx #OttWeather #YOW #OttNews #ONWx

🥈With a 7am windchill of -35.7, today is #Ottawa's ...

2026-02-08T14:42:53Z

🥈With a 7am windchill of -35.7, today is #Ottawa's windchilliest Feb 8th in more than 60 years, since 1963. #YowWx #OttWeather #YOW #OttNews #ONWx

Noon today was #Ottawa's 39th hour with dewpoint ≥ 24°C ...

2025-08-14T00:31:59Z

Noon today was #Ottawa's 39th hour with dewpoint ≥ 24°C this year which puts 2025 in 1st place for the most in any year since records began. #YowWx #OttWeather #YOW #OttNews #ONWx

🥇With a 4pm humidex of 42.0, today is #Ottawa's muggiest ...

2025-08-13T02:59:55Z

🥇With a 4pm humidex of 42.0, today is #Ottawa's muggiest Aug 12th since records began in 1953. #YowWx #OttWeather #YOW #OttNews #ONWx

Today is #Ottawa's 8th day with humidex ≥40 this year which ...

2025-08-10T19:31:25Z

Today is #Ottawa's 8th day with humidex ≥40 this year which raises 2025 from 8th to 6th place for the most in any year since records began. Just 1 more day to get to 4th place. #YowWx #OttWeather

but what about 1959?

2025-08-05T01:33:24Z

In reply to nevent1q…vd3r
_________________________

but what about 1959?

🥈For only the 2nd time in recorded history, #Ottawa's mean ...

2025-08-04T18:45:11Z

🥈For only the 2nd time in recorded history, #Ottawa's mean dewpoint was above 17.1°C during a month (July 2025). #YowWx #OttWeather #YOW #OttNews #ONWx

this only includes hours when the smoke is so thick that it ...

2025-08-03T00:14:48Z

In reply to nevent1q…j43a
_________________________

this only includes hours when the smoke is so thick that it reduces visibility below 10 km

2pm today was #Ottawa's 15th smoky hour this year which puts ...

2025-08-02T19:28:54Z

2pm today was #Ottawa's 15th smoky hour this year which puts 2025 in 18th place for the most in any year since records began. Just 4 more hours to get to 16th place. #YowWx #OttWeather

🥇With a 5pm humidex of 42.5, today is #Ottawa's muggiest ...

2025-07-24T23:09:20Z

🥇With a 5pm humidex of 42.5, today is #Ottawa's muggiest Jul 24th since records began in 1953. #YowWx #OttWeather #YOW #OttNews #ONWx

Near record humidex. Today's 2pm humidex of 40.8 brought ...

2025-07-24T18:54:58Z

Near record humidex. Today's 2pm humidex of 40.8 brought #Ottawa within 0.7 of the highest humidex ever recorded on Jul 24th. #YowWx #OttWeather

Thunderstorms inbound. Be prepared. ...

2025-07-13T18:11:05Z

Thunderstorms inbound. Be prepared.

10am today was #Ottawa's 26th hour with dewpoint ≥ 24°C ...

2025-07-13T14:06:26Z

10am today was #Ottawa's 26th hour with dewpoint ≥ 24°C this year which puts 2025 in 1st place for the most in any year since records began. #YowWx #OttWeather #YOW #OttNews #ONWx

Today is #Ottawa's 3rd ≥33°C day this year which is ...

2025-07-06T19:36:36Z

Today is #Ottawa's 3rd ≥33°C day this year which is already more than the median amount we get during an entire year. #YowWx #OttWeather

Yes, I should have posted about that separately

2025-06-24T20:25:25Z

In reply to nevent1q…v76x
_________________________

Yes, I should have posted about that separately

🥉With a ~2pm high of 33.7°C, today is #Ottawa's hottest ...

2025-06-24T19:03:12Z

🥉With a ~2pm high of 33.7°C, today is #Ottawa's hottest Jun 24th in more than 100 years, since 1919. #YowWx #OttWeather #YOW #OttNews #ONWx

🥇With a 10am humidex of 43.2, today is #Ottawa's muggiest ...

2025-06-23T14:58:29Z

🥇With a 10am humidex of 43.2, today is #Ottawa's muggiest Jun 23rd since records began in 1953. #YowWx #OttWeather #YOW #OttNews #ONWx

The 10AM humidex at the airport was 43.2; which is the highest ...

2025-06-23T14:11:01Z

The 10AM humidex at the airport was 43.2; which is the highest humidex ever recorded at 10am. The any-hour highest humidex is 47.2. Let us see how this day goes.

Get ready for an active week of weather. 1, 2 or even 3 storms ...

2025-03-26T18:04:09Z

Get ready for an active week of weather. 1, 2 or even 3 storms are possible over the next 10 days; Huge Snowstorm, crippling ice storm or slushy mix of everything is possible.

I still have about 5-10cm in full sun in my yard

2025-03-20T23:26:23Z

In reply to nevent1q…x2h7
_________________________

I still have about 5-10cm in full sun in my yard

They are supposed to measure 3 "representative" spots and ...

2025-03-19T13:58:25Z

In reply to nevent1q…8hgv
_________________________

They are supposed to measure 3 "representative" spots and average. Must have been 3 pots of coffee.

I'm actually suspicious myself. The last 7cm melted too ...

2025-03-19T13:56:28Z

In reply to nevent1q…lc68
_________________________

I'm actually suspicious myself. The last 7cm melted too quickly. I think something funny went on with these measurements, but the card says "Moopes".

This morning's official snow depth measure at the airport was ...

2025-03-19T13:46:02Z

This morning's official snow depth measure at the airport was 0cm (trace). The contest is over, the winning day is March 19th. Please let me know if you originally guessed March 19th.

For only the 8th time in recorded history, #Ottawa stayed above ...

2025-03-07T14:04:50Z

For only the 8th time in recorded history, #Ottawa stayed above -24°C during an entire meteorological winter (meteorological winter 2024). #YowWx #OttWeather

Over the past 151 years, #Ottawa's average daily low ...

2025-01-07T14:16:53Z

Over the past 151 years, #Ottawa's average daily low temperature has increased by 2.5 ± 0.5°C (95% CI). #YowWx #OttWeather #YOW #ONWx

#Ottawa just had its highest year minimum temperature since ...

2025-01-05T18:37:07Z

#Ottawa just had its highest year minimum temperature since records began. The minimum temperature during 2024 was -19.5°C. #YowWx #OttWeather #YOW #OttNews #ONWx

For only the 2nd time on record, #Ottawa has not had a measurable ...

2024-12-01T16:17:15Z

For only the 2nd time on record, #Ottawa has not had a measurable #snowfall before December 1st, and still counting...

https://buymeacoffee.com/rolfcampbell

#OttNews

(yesterday officially had only a "trace" at the airport)

Yeah, this year I'm switching mine ... today.

2024-11-08T16:16:10Z

In reply to nevent1q…gfj2
_________________________

Yeah, this year I'm switching mine ... today.

When do I switch my all-season tires for snow tires? tl/dr: Oct ...

2024-11-08T16:13:21Z

When do I switch my all-season tires for snow tires?

tl/dr: Oct 22nd. That's the first day with an average daily temperature below 7°C.

Long answer: It depends on when you drive. If you drive once in the morning, and once in the afternoon (like most people), then Oct 22nd is your answer.

If you drive ONLY in the early morning, then you should switch earlier (Oct 1st).

If you ONLY drive in the afternoons, then you should switch later (Nov 13th).

Thanks for the idea: Kevin Bowrin ☕ (npub1ls3…h0cl)

Near record humidex. Today's 10am humidex of 24.1 brought ...

2024-11-06T15:29:59Z

Near record humidex. Today's 10am humidex of 24.1 brought #Ottawa within 0.5 of the highest humidex ever recorded on Nov 6th. #YowWx #OttWeather

Tomorrow is forecast to be the 8th warmest November day on record ...

2024-11-06T02:31:03Z

Tomorrow is forecast to be the 8th warmest November day on record in #Ottawa: 22°C. #YowWx #OttWeather

🥇With a ~3pm high of 23.9°C, today is #Ottawa's warmest ...

2024-10-31T19:29:50Z

🥇With a ~3pm high of 23.9°C, today is #Ottawa's warmest Halloween since records began in 1872. #YowWx #OttWeather #YOW #OttNews #ONWx

🥇With a ~4pm high of 22.2°C, today is #Ottawa's warmest ...

2024-10-30T21:41:17Z

🥇With a ~4pm high of 22.2°C, today is #Ottawa's warmest Oct 30th since records began in 1872. #YowWx #OttWeather #YOW #OttNews #ONWx

🥇With a ~3pm high of 22.0°C, today is #Ottawa's warmest ...

2024-10-30T20:45:42Z

🥇With a ~3pm high of 22.0°C, today is #Ottawa's warmest Oct 30th since records began in 1872. #YowWx #OttWeather #YOW #OttNews #ONWx

🥇With a 2pm humidex of 25.4, today is #Ottawa's muggiest ...

2024-10-30T18:19:37Z

🥇With a 2pm humidex of 25.4, today is #Ottawa's muggiest Oct 30th since records began in 1953. #YowWx #OttWeather #YOW #OttNews #ONWx

Today is #Ottawa's first #snow of the season. Typical first ...

2024-10-27T14:03:18Z

Today is #Ottawa's first #snow of the season. Typical first is October 28. Record earliest is Aug 29, 1965; latest Nov 28, 1913. #YowWx #OttWeather

For only the 5th time in recorded history, #Ottawa stayed above ...

2024-10-07T15:30:35Z

For only the 5th time in recorded history, #Ottawa stayed above 4.7°C during an entire September (September 2024). #YowWx #OttWeather #YOW #OttNews #ONWx

these are not supposed to be warnings. Just observations

2024-09-25T16:31:36Z

In reply to nevent1q…c7gp
_________________________

these are not supposed to be warnings. Just observations

#Ottawa hasn't recorded a temperature below 3°C in 150 days, ...

2024-09-25T13:15:07Z

#Ottawa hasn't recorded a temperature below 3°C in 150 days, which is the 5th longest on record. #YowWx #OttWeather #YOW #OttNews #ONWx

🥉Yesterday was #Ottawa's 144th consecutive day with ...

2024-09-19T14:12:06Z

🥉Yesterday was #Ottawa's 144th consecutive day with minimum temperature ≥4°C which puts this run in 3rd place for the longest run on record. If this continues, we will reach 2nd place today. #YowWx #OttWeather #YOW #OttNews #ONWx