2018/02/13

February Rain

Today we're continuing our series on rain-in-months-that-you-wouldn't-expect-to-have-rain, with February.

Previously we've looked at:
That means that during the winter of 2017-2018 we've had rain in November, January and now February, but we didn't get any in December so I don't have a writeup for it yet.

Here's the recent history of how often the International Airport has recorded rain during February:


And it's actually pretty sparse, with only 15 rainy days since 1995 that recorded any rain. 

The big standout here is Valentine's Day, 2015 which had a whopping 7.4mm.

In terms of long-term trends:

And again, things are pretty quiet. 

In the 56 years since 1961, there have been 20 that recorded rain during February. Although 7 (now 8 including 2018) of those have been since 2007, so it's possible that the frequency is increasing.

One thing that surprises me is that February is less rainy than January, even though it's usually a few degrees warmer.

January versus February

January has had rain in 33 of the last 56 years, compared to February's 20.

Averages don't have a lot of meaning when the rain is so infrequent, but January's average rainfall is 1.65mm compared to 0.65mm for February. And for a bit more context, March also doesn't get much rain averaging 1.1mm, but then April gets 15mm, and our rainiest month July gets 93mm.

February is 2 or 3 days shorter than January, so there is that to consider. But February is also typically the least snowy of the main winter months, and apparently that applies to rain as well.

Update for February 13, 2018:


Here is the first chart, updated for the rain that fell on February 13, 2018.

The International recorded 0.4mm of rain, and Blatchford recorded 0.7mm of generic precipitation (Blatchford doesn't distinguish between rain and snow, which is why this chart use data for the International).

0.4mm isn't nothing, but it is less than the 1.2mm that fell in 2017 on February 18, and it's also obviously much less than the 7.4mm in 2015.

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