The Dec. 1910 at Vegas is clearly bogus, so what is highest credible NV reading for December? I can find an 83 reading at Indian Springs in Dec. 1955. Let me know what any of your findings are..
December 1955 did have a warm spell (in contrast to the impressive cold snap the month before), but the 83 does seem a bit warm for the location. I guess it still could be valid, but this seems a bit unlikely since that reading is warmer that only locations in the area that are normally warmer than Indian Springs and also warmer than the record low in February (which is very unusual for that region). It is also only 3 degrees from the November record high, which is also unusual.
There were some weather stations on the Arizona side of the Colorado River that recorded credible readings in the 80's in 12/1980. Had stations such as the Laughlin one existed then, they almost would have certainly also recorded temperatures in the 80's. I guess you really can't count that though, but it is highly likely that temperatures were similar on either side of the river (which forms the border).
One credible December reading in the 80's was 80 at Overton on 12/11/1939. This was a widespread warm spell and many records in that part of the country were broken.
Desert National Wildlife Refuge also recorded an 81 on 12/16/1942.
Laughlin also had an 80 on 12/14/2017. As mentioned, the temperatures in 12/1980 were probably higher, but the station didn't exist then. I suspect that Laughlin will eventually set a lot more state records as time goes on since it is the hottest part of Nevada and the station has only existed since 1988.
The May reading of -7 in 1990 at Pine Valley seems highly suspect. The next lowest credible May low I can find is 3 degrees at Currie in 1965.
Yes; I'm not even sure where the Pine Valley reading comes from. At the official Pine Valley Station data from May 1990 happens to be missing. The lowest May reading that I can find there is 9 on 5/2/1988, though it did hit -3 on 4/29/1990 (this one is valid; several record lows were set in the region). The latest it has gotten down to at least -7 at that station was -12 on 3/4/1989 (another collaborated reading).
Other than being listed as the May state record for Nevada, I haven't been able to find anything on the -7 reading.
I have some issues with the -33 March reading at the Diamond Valley station in 1969. Do any of you think it is legit?
I would say it isn't legitimate. There are three weather stations in that valley and none of them have recorded even close to -30's temperatures in March. That reading really does stand out because the Diamond Valley Hall station (1963-1971), which is where the -33 was supposedly recorded didn't record temperatures close to that in January and February. The -27 on 12/22/1968 is probably valid though.
If not, what would you consider the lowest 'reliably measured temperature in NV in March??
Wildhorse Reservoir supposedly recorded a -32 on 3/20/1984, but it also seems a bit too low (and tied with the January record), though Wildhorse Reservoir does record some of the coldest temperatures in Nevada. Next would probably be -28 Charleston on 3/7/1964. I'd say this one is certainly valid. Many record lows were broken in the region on that day. I'd choose the -28 Charleston to be the "real" March record.
The November high of 98 at Mesquite in 1944 seems dubious.
Yes. Las Vegas only hit 80 then. The Callville Bay reading is probably accurate. Overton also hit 91 on 11/1/1944. Mesquite usually has similar temperatures to Overton. Mesquite did hit 90 on 11/8/1958, but other than the state record, I can't find any 98 November reading at Mesquite.
The highest credible reading I can find is 95 at Bunkerville in 1988.
Probably so. I was thinking it might be 94 at Laughlin on 11/1/1988 and 11/1/2008, but the Bunkerville reading could certainly be valid.