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It's getting to the time of year when we start seeing threads asking this question.

The US Polo Association put out nice guidelines regarding a heat index and working one's horse. My only caveat is that most polo ponies are extremely fit, so adjust for the fitness of your mount.

"The following rule of thumb has been devised as a guide. If the sum of the temperature and humidity is:
· Less than 130 - no problem;
· Greater than 150 - use caution, especially if the humidity is greater than half of the total;
· Greater than 180 - use extreme caution, since normal cooling is almost ineffectual and horses may resort to panting."

heat-index-warning_170605_201638 (1).jpg

Courtesy uspolo.org
 

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We hit a 100 last week. I usually ride in the early morning or late this time of year.
 
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Thank you. My mare was throwing a fit on Sunday. It felt like I was trying to ride an unbroken horse. She is usually a really good little horse. The only thing I can think of is that she has more sense than me and was telling me that it's too hot. Last night she was back to her mild manners. Maybe I should stick to riding in the cooler parts of the day.
 

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Ditto this should be a sticky at the top.

We also have already had several days with the combined heat/humidity over 150:(

My rule has always been, if it's too hot and sweaty for me, it's too hot for the horse:)

Thank Boots for posting this table:)
 

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Wow... I had to convert that to Celcius. 130 F is about 54 C - crazy! I've seen it get into the low 40s with the humidity, but don't recall ever seeing it get to 50. Even if my horses were ok (they wouldn't be), I wouldn't want to ride in that!!! My point is: there is great variability in horses, but also, in climates. Horses that rarely ever see more than 30 C may not be able to cope with 50 C regardless of what the chart says.

Edited to add: it was barely above freezing last night. We haven't been able to plant our gardens yet because of the cold temps we've been having.

Edited again... is the second line up from the bottom wrong? The last number is 700 :)
 

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I've been trying to get as much in now as possible.
For Florida, the evenings have been pretty nice. The spring showed no rain what so ever so humidity was extremely low for here. Now we're getting it and it's leaving cool evenings.
Usually by this time of year I'm not riding at all. I'ts just too hot for all of us and the horses are spending there days between some grazing and loafing around under shade and fans.

@Acadianartist You are right. I'm sure our horses fare a whole lot better down here in the humidity than your guys would just because they are used to it. Still, our riding time down here is in the fall, winter, and spring. Summers down here are ridiculous even if you were to ride in the middle of the night.
 

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Hi All!

I don't have to worry about my critters and the heat, their daddy wimps out way before it gets hot enough to bother them ;-)

AA, yea; there is something wrong with the data in that line. Also, the numbers are the _sum_ of temperature and humidity. Not too many places in the world see 130F/50C.
 

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Hi All!

AA, yea; there is something wrong with the data in that line. Also, the numbers are the _sum_ of temperature and humidity. Not too many places in the world see 130F/50C.
Yes, I'm aware that it's the sum of both. There is a similar scale in Celcius. Even so, we rarely get over 30 C (86 F) in the heat of the day here WITHOUT the humidity so 100F (again, before factoring humidity) would be a rare occurrence here. Humidity can get high, but rarely comes with high heat. Anyway, my point was that it is all relative, and that horses are used to different climates.
 

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Our weather has been wacky. One day it's in the 70's, the next 90, then back to 63F. LOL. Today it's going up to 66F but next week looks like...92F! :O I think summer is trying to get here...lol.

If it's too hot for me, I agree it's too hot for the horse. The humidity is what really kills me! :sad: Plus Redz is 24 so I don't want him to bake in the darn heat! But it's perfect weather for bathing him so that's probably what I'll do if it's that hot next week. :) He sweats!
I try to ride in the AM to beat the heat though. That's why I'm glad my lessons are at 8/8:30AM every Saturday in the summertime. I can only ride in the morning on the weekends sadly because I work M-F but at night sometimes it cools off. Ugh...just annoying how bipolar the weather can be lately!
 

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..."The following rule of thumb has been devised as a guide. If the sum of the temperature and humidity is:
· Less than 130 - no problem;
· Greater than 150 - use caution, especially if the humidity is greater than half of the total;
· Greater than 180 - use extreme caution, since normal cooling is almost ineffectual and horses may resort to panting."

View attachment 897402

Courtesy uspolo.org

Thanks for posting this boots, especially the chart - which I haven't seen before.

Always have wondered about the 131-149 range, as it is not in the rule of thumbs list. There are 3 items. There are 4 on the chart: White, Yellow, Orange, and Red.

So what would be the 'description' for handling the Yellow zone on the rule of thumbs list?


...


I suppose an appropriate answer might be: Don't sweat the Small Stuff. LOL
 

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@Acadianartist - I did the conversion too and was like...WTH!? If it is 25 celsius I am melting and don't do anything with the horses. I don't think I could survive in 50 celsius!

Of course, horses acclimatize....just like ours tend to handle the -30's better than those used to hotter climates.
 

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we get temps in the 30's (celcius) at 60-80% humidity all summer here in argentina. So thats a combined score of around 170 D: I rode early and mostly stuck to a walk with half a circle of trot thrown in here and there... most people turn their horses out in the countryside for 2-3 months (december 15th-end of february)
 

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In our nice toasty valley, we reached 113 degrees a couple weeks ago. It was miserable.
 

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You Canadians make me laugh! :lol:

We here in the desert are in now what I call our 'winter'. Everyone stays inside in AC to beat the heat, and hardly anyone rides. By 8am, we've hit 85-90F and typically climb to temperatures of 100-110F, sometimes more, by noon.

I do light riding, maybe once or twice a week at the very most, in the couple hours before dark.

The nice thing is that we can drive two hours north and escape to cooler temperatures!
 
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You Canadians make me laugh! :lol:

We here in the desert are in now what I call our 'winter'. Everyone stays inside in AC to beat the heat, and hardly anyone rides. By 8am, we've hit 85-90F and typically climb to temperatures of 100-110F, sometimes more, by noon.

I do light riding, maybe once or twice a week at the very most, in the couple hours before dark.

The nice thing is that we can drive two hours north and escape to cooler temperatures!
I used to ride from 5 am to 8 am everyday. There was a group of us who met up every morning for a ride. Sometimes we'd go out after 8 pm and ride in the moonlight too. But between 8 am & 8 pm, other than to check water, we didn't do much outside.
 

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Around here, never mind the too hot to ride chart, how about a too COLD to ride one?
 
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