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Old 10-27-2013, 10:32 AM
 
Location: In transition
10,635 posts, read 16,694,364 times
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If it's sunny and calm, then over 20°C is T-shirt weather
If it's rainy and windy, then over 25°C is T-shirt weather.

I just wish I could live in a place where I can wear just a t-shirt outside year round and feel comfortable
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Old 10-27-2013, 10:38 AM
 
Location: HERE
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Sunny and calm= 60 F +
Cloudy or breeze= cut off is between 65 and 70.
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Old 10-27-2013, 12:56 PM
 
Location: Vic, Australia
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30C plus, anything less and ill be wearing more.
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Old 10-27-2013, 01:09 PM
 
Location: NSW
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Usually over 21C is easily T-shirt weather, which is most of the year here in the middle of the day.
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Old 10-27-2013, 01:29 PM
 
Location: Switzerland
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Normally about 20C+, but it also depends on season or daytime. If it's raining maybe about 24C+
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Old 10-27-2013, 01:42 PM
 
Location: Top of the South, NZ
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I don't think I have a T-shirt temperature as such. The dew point is as probably as much of a factor. It was 19/20C here yesterday, but with low humidity (33%, for a 3.2C dew point))and it felt chilly. 20C with a 15C dew point, feels much warmer.
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Old 10-27-2013, 01:50 PM
Status: "From 31 to 41 Countries Visited: )" (set 3 days ago)
 
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The high temperature 72+, and low temperature 62+, so a minimum high around lowest 70s and low in lowest 60s: 72/62. This is including sunny, cloudy, windy, rain, low wind speed etc.

Sometimes 70/60 is the minimum t-shirt weather if extremely humid, low diurnal range, very cloudy, and no wind after warmer weather. If the low temperature is below 50-55 degrees, and windy, after cooler weather, then mid 70s up to 77 degrees high temperature is sometimes not really t-shirt weather.

I prefer t-shirt weather most of June, all of July, August, 50%-70% of September, and 25%-30% of October, and Late May. I don’t mind some rare t-shirt weather days November-May, especially in exciting Continental climates. I have a rather high standard for t-shirt weather. lol


Where I live right now, there was ZERO t-shirt weather days since September 11th. Most years almost of June is not t-shirt weather, and then half of July-August is vulnerable to anemic summer weather with few exceptions. Almost never really warm enough to go into the oceanic water without risk of hypothermia and wetsuit. Pacific Northwest summers are overrated most years, at least in Vancouver-Seattle.
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Old 10-27-2013, 03:40 PM
 
Location: Coldwind Farm
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Usually 25C+
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Old 10-27-2013, 06:48 PM
 
Location: Corona the I.E.
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Depending on wind and altitude, yes altitude, above 60F/16C in CO and CA 65F/18. In CO, you will see people wearing short and t shirts in the winter above 40F crazy to me.
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Old 05-01-2015, 09:31 PM
 
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Minimum threshold

Sunny : 18-20c / 64-68f i think depends on UV index/sun angle
Cloudy/windy : 20-23c/68-73f depends on wind speed / cloud cover
rainy : umbrella needed, i think around 24c/75f, but the fact that rain spread germs, not the cool/cold water, that causes sick, even at 80f rain
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