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Weather and Gardening Discussion

Here's another similar threshold that illustrates the warming local climate, particularly at nights in the summer - most days over 10 degree minimum. Despite no real notable really hot heat waves, 2025 still made it to the new record.

All of the top 5 are in the last 5 years, 9 of the top 10 are in the last 12 years.

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Mountain Man said:
We are one place that looks to mostly benefit from climate change, apart from maybe running out of water in the future lol.
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Yeah, a longer growing season is awesome .... but you need water to actually grow stuff (and live). This is the next record I have my eyes on:
Calgary on track to see its driest September in more than 100 years

We haven't gotten more than 0.5mm of rain in day since mid August. It's lucky July was so rainy or we'd have had water restrictions all summer probably!
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Calgary's limiting climatic factor in the future will be less about the harsh frosts and cold winters, it's going to be increasingly about lack of reliable water IMO.
 
I know that the airport has become fully surrounded by development in the past decade. I wonder how much all that concrete, asphalt, rooftops retaining heat factor into these numbers, up until recently that weather station was far from development. Not denying climate change here, just commenting on the urban heat island effect extending further and further out.
 
There would definitely be a heat island effect. Probably a slight effect in the NE being that's the weather station is close to prairie, but there would be an effect. Where I live, close to inner city NW the change has been noticeable, I think even more so than we see in the environment Canada records.
 
Definitely gonna smash this record. A bunch of others will fall this season as well.

today-is-calgarys-158th-consecutive-day-with-maximum-v0-96uk7sniirrf1.png
 
Picked some more apples today. I’ve been getting full sized apples since the end of August and with no frost in forecast for 14 days, I’ll still be picking them well into October.

For most years the apples used to be about 2/3rds the size of this. For about the last five years or so the apples have been bigger as the seasons have been longer. Those extra 3-4 weeks of warm weather with no frost makes a difference.
IMG_5338.jpeg
 
Ending the month of September with an average high of 24⁰ and an average low of 9⁰ is crazyyy.
 
lemongrab said:
Looks like this will be under threat on Sat/Sun, but the outlook beyond that looks warm again
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I mean we've already matched the record, so thats fine.
 
CBBarnett said:
Another interesting factoid from https://www.reddit.com/r/CalgaryWxRecords/ .

Longest streak of above 4 degrees in history, pushing 120+ days.

View attachment 683494
We might test this low tonight or tomorrow, but if it doesn't drop too low, the forecast shows we have a good 7 to 10 more days at least - might end up in the 130+ days.

Of the 10 longest streaks in 145 years of data, 7 are in the past 15 years.
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We're now at 134 days above biological zero (4⁰). Crazy that our previous record was 110.
 
I remember back when I took horticulture in high school, we were taught the average number of frost free days for Calgary was 105. It could have been information that was carried forward a few decades, but either way, it's safe to say we are well past that.. I'd be curious to see the last time we had a frost free run of 105 days or less.
 
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