I love to share this story:
I was living in a very temperate part of Guatemala and took a trip for a weekend to a beach town that was quite hot and humid. I had heard that a restaurant right on the beach served incredible homemade ravioli and decided to treat myself to something I rarely eat. I ordered and when I went to bolus my pen needle broke and I didn't have any spares on me! The hotel was a hot 15 minute walk each way back up the beach. So I decided to just enjoy the ravioli and correct later for the intense high I knew was coming. I got back to my room and tested - normal....one hour later...normal...two hours later...normal, etc. Huh? I finally guessed it was the heat and for the rest of the weekend bolused very little and fought lows even when I did!
For the last four years I've lived in first Guatemala and then the SF Bay Area where it rarely hits 80 degrees. Now I've moved back to an area where we have triple digits in the summer (though with very low humidity). It's already been up to 90 and I've been suntanning in my hammock and no sign of a change in insulin. Darn! I can't help but wonder if the beach experience had to do with a combination of humidity and more walking! Sigh.