I hope this isn’t a stupid question…
Is there an ideal temperature to store your whistle? I have a brass whistle and I usually practice in my basement where it’s roughly 70 degrees Fahrenheit. I notice it kind of squawks a bit when I play and I’m wondering whether or not it’s the temperature (or my bad playing). I store my guitars in the basement because the temperature is good but I don’t know much about whistles.
if you do have metal whistles (which most are) then it doesn’t make a difference, temperatures are mainly important for wood instruments.
but you could try to warm up your whistle before you start playing and see if that helps, by covering the windway with your finger and blow a few times.
sometimes it’s the whistle that is the fault…depending on what whistle you have…the cheapies sometimes do this…
greetings
berti
I think temperature affects most all instruments in some way. Whistles tend to gather condensation rather quickly. Even if the windway doesn’t clog, a little moisture there or on the blade can really change things. Often, I find myself blowing a bit harder to compensate, and then the squawking commences.
70 sounds warm to be getting a lot of condensation unless the humidity is very high or your breath is very hot 
.
Make sure there is no moisture collecting anywhere. Also that you are getting a good seal with your fingers.
Some whistlers (did I SAY me?) tend to drool into their precious pennywhistles, and this will wake the squawk-monster as well…
The more I practice, and the better i get, the less I squeak. Also, I’ve had several inexpensive metal whistles with plastic mouthpieces that leak. No amount of practice would stop the squeak. The plastic flange that meets the end of the metal barrell was cracked or incomplete. It was only when I got more, not necessarily more expensive, whistles did I realize it was poor quality control in the whistle’s manufacture. Of course I did also move on to more expensive whistles with better quality control. The squeaks on those are all mine.
Thanks for the replies 
I do have a cheap whistle, but I’m a beginner so it’s okay for now.
I cured my squeaky whistle by playing it in a tub full of bubble bath.
Playing it in a tub of bubble bath or soaking it in a tub of bubble bath? The first image is quite interesting 
What brand of whistle is it. Perhaps it just needs a little tweek to remove the squeek. That is to fill in the cavity under the air ramp with sticky tack or clay. There are some ways to check for leaks around the head to the tone tube. Put tape over the tone holes and a finger or tape over the end and a finger over the fipple window, (the place where the air comes out the top). A few drops of soapey water at the connection between the head and tube than blow. If there are blubbes, There is a leak. There are many ways to fix a leak at the head to tube. Fastest way is to clean it off and tape it.
Or if it slides off put some wax there and slide it back on. If it does not slide off go to the home page here and read how to tweek a whistle and it will tell how to remove the head without breaking it.
And some squaks and squeeks are removed with pratice. Also most whistles play better in a warmer than cold temperture.
I think the warmer temperature is what I need.
I took Berti’s advice and warmed up the whistle by blowing into before I played and it helped a great deal. I didn’t have to blow as hard to sound clear notes and there was no squawking
I have a Walton’s Mellow D btw.
It’s likely that you’re dealing with Dewpoint. Basements are usually colder than rest of the house.
Take for example: A house has room temperature on the 1st floor of 75 Deg. F. The dewpoint is 60 Deg. F. That will make the relative humidity to be 60%.
Now, take that 60 Deg. F Dewpoint air and send it into the basement where it is only 65 Deg. F Room Temperature. The relative humidity is now 84%, some of the cold surfaces in the room and water pipes may even be showing condensation. A whistle that is in the room receives super hydrated air from your breath and for a few minutes, the body tube is cold and will condense. The fipple might even clog a bit. Eventually it warms up in your hands and plays fine.