Your own-made climate normals/averages

Heathrow's Max/Min/Mean for 1991-2019

Jan: 8.4 / 2.6 / 5.5
Feb: 8.9 / 2.6 / 5.7
Mar: 11.7 / 4.2 / 7.9
Apr: 14.9 / 6.0 / 10.5
May: 18.3 / 9.1 / 13.7
Jun: 21.5 / 12.0 / 16.8
Jul: 23.9 / 14.2 / 19.1
Aug: 23.3 / 14.0 / 18.7
Sep: 20.2 / 11.6 / 15.9
Oct: 15.8 / 8.8 / 12.3
Nov: 11.4 / 5.2 / 8.3
Dec: 8.8 / 3.1 / 6.0

Uploading some more of my favourite Australian climates—all in South-Western NSW (Riverina).

I've fixed Batlow, NSW on Wikipedia, by replacing the inaccurate ClimateData.org climate box with BoM's: 



Trivia: Green Hills State Forest was the chief instigator of the January 2020 Dunns Rd. Bushfire.

Kunama and Laurel Hill, NSW; climates which yield particularly heavy snowfall:





Carabost and Rosewood, NSW yield strikingly cool maxima for their altitudes; 580 and 457 m, respectively: 

Behold the intensity of a northern Wisconsin winter:

I've compiled averages and records for the 1881–1910 period in Wagga Wagga (Kooringal), and far king oath, those summers were downright brutal! The range between summer and winter maxima was almost 22° C, and the precip pattern was of a more mediterranean nature. Winters were more extreme as well: a max temp of just 1.7° C was recorded in Jul 1879 @ Kooringal.


 
100 years later, Wagga Wagga AMO (1981–2010) shows a dramatic reduction in summer temps (especially December), but winters have warmed (Jun and Jul) and overall has become much less extreme (seasonal range 19° C), with changes in precip pattern as well (more evenly-spread); precip days have increased by 10, thus cloudier. This station's 28 m lower in altitude than Kooringal.

London, 1991-2020. Obviously still a work in progress. The true mean maximum and mean minimum will be closer to 33c and -5c.

I totalled up some statistics from a weather station in one of the highest villages in England, called Flash Staffordshire, located 4 miles south-west of Buxton. The data only goes back to 2015, and some months since then are also missing, which means the potential of cold in winter is not evident on these figures because such cold winters as 2010 and 2013 are missing. However, it gives an idea of what it's like living at 490 meters in NW England. There's no rain/sun data but I expect it would be wetter and cloudier than Buxton.

Found an active station that's actually on the west coast of Sweden (as in the archipelago coast from Gothenburg and northward), that's not either on a small island/islet or multiple kilometers inland. I was surprised at how warm this station was despite having zero UHI and being on the mainland in the sense that you can drive to it. A 8.5'C mean is very impressive for being "mainland" station without any UHI at 58.1'N. Oxelösund, the closest comparison on the east coast (at 58.4'N) only manages a mean of 8.1'C, and that station at least has some kind of UHI since the town has 11k inhabitants.

Temps match up very well with the coastal stations on Norway's SE coast, but with slightly warmer temperatures throughout the year except for Jan-Mar where Landvik has the same mean but a higher diurnal. SE Norway is even wetter though. This is Landvik, Norway 1999-2020 (Eklima)




Compared to the UHI station of Gothenburg, the temps are actually very reasonable. Using 2002-2018 the July and January temps are 22.2/13.6 and 2.2/-2.5 respectively for Rörastrand, and 22.8/14.8 and 2.6/-1.9. A 0.6'C increase in summer highs, and 1.2'C increase in summer lows, with a 0.4'C increase in winter highs and 0.6'C increase in winter lows seems very reasonable for a station located anywhere inside a million population city.

I created station normals for Oklahoma City and Raleigh for the 1891-1920 period.
Oklahoma City's highs have since increased 2.2°F (1.2°C) and lows have increased 1.0°F (0.6°C). Oklahoma City has gotten 5.3" (135 mm) wetter.


Raleigh's highs have since increased 2.3°F (1.3°C) and lows have decreased 0.3°F (0.2°C). Raleigh's precipitation has barely changed.