General Question

crisw's avatar

Anyone here familiar with Ontario weather?

Asked by crisw (14116points) May 25th, 2011

That’s Ontario, Canada.

I’ll be traveling to Toronto in July and want to do some bike touring nearby (probably the Greater Niagara Circle Route.) But I understand the weather can be very hot and humid. What I am wondering is, with the long days, are the evenings noticeably cooler? If so, what time does it start to cool down? Is there much cloud cover in the mornings, or does it heat up fast? I don’t do well with heat, so I want to try and plan my trip to avoid as much of it as possible :>)

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21 Answers

Jude's avatar

August is worse than July. :)

You know, it is never really the same each year. Although, our Winter and Spring, this year, have been spot on. Meaning, both are like how it used to be when I was younger. I would say low to mid 80’s during the day. Sometimes, you get up there in the low 90’s. Humid, yes, but, not so humid that it makes you gag and you need to be indoors. The evenings, around 7ish, or so, the temperature drops. It could go down to the high 40’s. So, be prepared.

crisw's avatar

High 40s would be great! I am not used to humidity at all- San Diego is very dry.

Seelix's avatar

It’s definitely humid in southern Ontario – much more so than I’m used to (I grew up in Sudbury, which we refer to as being in northern Ontario though geographically it’s central). I moved to Toronto in July of last year, and I had a pretty rough time adjusting to the humidity. Make sure you keep yourself hydrated big-time, especially if you’re from a dry area. (I haven’t been to California, so I can’t make a real comparison.)

@Jude seems to have it pretty down pat. I’d trust her judgement over mine, since she’s been in the area longer than I have. But since I come from a dry area as well, keep in mind that it might indeed be a lot more humid than you’re used to. Drink lots and hope for wind :)

JLeslie's avatar

I would say 80’s during the day and 60’s at night if I had to guess. Could vary 10 degrees either direction. www.weather.com is great to get monthly averages, but it did not load for me. If you go to month, then at the bottom you can click on averages during the year and see July weather. I can’t remember if it shows humidity? I am pretty sure it does show rainfall. I think I have used it for cities outside the US? If not just put in Buffalo NY or Niagra, NY.

crisw's avatar

@JLeslie

I have found lots of averages, but they don’t tell what time of day it starts to get cool or heat up. Temperatures in San Diego, for example, go down quickly once the sun sets, in part because because our humidity is so low.

crisw's avatar

@Seelix

Hope for wind blowing in the right direction, that is!

Response moderated (Unhelpful)
JLeslie's avatar

@crisw Sunset in the Niagra is probably around a half hour later than San Diego, so maybe 8:30 in July more or less? When the sun goes down the temp will start to drop quickly. But, again it will be around a 20 degree difference from the daytime I would say. Jude’s temperature change is too extreme in my opinion on a given day, but it could be in the 40’s, but that would likely mean the day temp only was in the high 60’s or low 70’s. Still, in July it is likely to be the warmer part of the summer. Warmest part of the day I am guessing will be somewhere around 3:00–4:00. That area of the country has a lot of foliage, and the shady, heavily wooded areas can be up to 10 degrees cooler than downtown areas that have more direct sun, and if there is a change in elevation that will add to the temp change. The best thing is to check the 10 day weather forecast before you leave and get an idea where the temps will really be that week.

Bring a light cardigan or a hooded sweatshirt in case, but mostly short sleeves and tank tops.

JLeslie's avatar

Oh, even though after three is the hottest time, don’t forget sunburn will be worst around 12:00–1:00. Although, I would protect my skin all day, especially 10:00–5:00.

And, I did not answer what time of day it really starts to heat up. By 10:00 it will be in the 70’s on a day that will be in the 80’s. The mornings will feel moist likely, morning dew, and possibly some cloud cover, but that many times burns off as the day heats up, and the day does not necessarily have to be very high in humidity.

Seelix's avatar

Sorry, @JLeslie, but I have to disagree on a couple of points. In southern Ontario in July of 2010 I saw temperatures of 40C or more (which is over 100F) with high humidity such that you start to get beads of sweat on your upper lip within minutes of stepping outdoors.

In mid-July the sunset is at about 9pm.

JLeslie's avatar

@Seelix 40 was the low. 40F. Good you confirmed the sunset time. A lot people forget in the summer how late the sun goes down more north, and some depends how east or west in the particular time zone. When I lived in MI, it is so geographically close to central time sundown was just short of 10:00 in the summer.

I agree it could easily be up in the 90’s, I said average temp 80’s during the day. Short sleeves and tanktops.

crisw's avatar

Thanks, all for the useful info! Hopefully we won’t get those 40C/100F really humid days- I went through that once in Washington DC (not on a bike!) and it was no fun.

JLeslie's avatar

I think July is a great month to visit that part of North America. Not likely to get much rain, temps should be good, pollen should not be high if that is a factor for you, and it will lush and verdant. Have a great trip.

crisw's avatar

@JLeslie

Yeah, my only trepidation is that my ideal operating temperature is about 40–50F/4–7C when biking! I like it cold. I didn’t choose the time of year; my husband is on a team for the American Contract Bridge League nationals, which are being held in Toronto, so I am along for the ride.

JLeslie's avatar

@crisw That’s probably more like late September.

Seelix's avatar

4–7C? You likely wouldn’t find temperatures like that until late October or early November. Invest in some good moisture-wicking cycling clothes!

crisw's avatar

@Seelix

Yep, I’ve biked through 40 degrees and rain in the Sacramento Delta in my cycling shorts and REI windbreaker and loved it!

JLeslie's avatar

Actually, @Seelix is right, more like November. As long as there was not a snow to really mess up cycling.

Schroedes13's avatar

I think it far hotter in July that in August…..just saying! Our saying is that my hometown, Pembroke, Ontario, has two seasons, winter and July!

Seelix's avatar

@Schroedes13 – Southern Ontario represent! Though I’m actually from Sudbury, I’ve been in the T-Dot for a year now and am currently melting in the heat and hoping that the thunderstorms forecast for today aren’t just a cruel taunt.

Schroedes13's avatar

@ Seelix sad story sis. My hometown is just north of Ottawa, but I go to school in Hamilton. Luckily, I’m beating the heat this summer in China. Here, it’s usually +30—+35 with it feeling more like +35—+45!!! I am a winter man myself! I always say you can put on more and more layers, but you can only take so many off before you get arrested!

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