https://wiki.cancer.org.au/skincancerstats/UV_radiation <https://wiki.cancer.org.au/skincancerstats/UV_radiation>:
The UV Index is a standardised measure used to express UV radiation intensity. It is equal to 40 times the erythemally effective power of the sun in W/m2. The UV Index at solar noon is generally in the range 0-12 and values above 11 are considered extreme.[1] <https://wiki.cancer.org.au/skincancerstats/UV_radiation#cite_note-Citation:International_Agency_for_Research_on_Cancer_2012-1> In Australia, peak daily values in summer are regularly in excess of 12-14, and can reach 16-17 at more northern latitudes.[2] <https://wiki.cancer.org.au/skincancerstats/UV_radiation#cite_note-Citation:Gies_P.2C_Roy_C.2C_Javorniczky_J.2C_Henderson_S.2C_Lemus-Deschamps_L.2C_Driscoll_C_2004-2> When the forecast UV Index is ≥3, sun protection is required.[14] <https://wiki.cancer.org.au/skincancerstats/UV_radiation#cite_note-Citation:Allinson_S.2C_Asmuss_M.2C_Baldermann_C.2C_Bentzen_J.2C_Buller_D.2C_Gerber_N.2C_et_al_2012-14> Table 1: Australian capital city average daily maximum UV levels by month.[15] <https://wiki.cancer.org.au/skincancerstats/UV_radiation#cite_note-Citation:Gies_P_2013-15> Location Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Darwin 12 13 12 11 9 8 9 10 12 13 12 12 Brisbane 12 11 9 7 5 4 4 5 7 9 11 11 Perth 12 11 9 6 4 3 3 4 6 8 10 11 Sydney 11 10 8 5 3 2 3 4 5 7 9 10 Canberra 11 8 7 5 3 2 2 3 5 7 9 11 Adelaide 11 10 8 5 3 2 2 3 5 7 9 11 Melbourne 10 9 7 4 2 2 2 3 4 6 8 10 Hobart 8 7 4 3 1 1 1 2 3 4 6 7 Values are rounded to the nearest whole number. Highlighted months have an average daily maximum UV less than 3 even where rounding has made it appear otherwise. > On 8 Feb 2021, at 12:44 pm, Greg Troxel <[email protected]> wrote: > > I am at 42ish North (Massachusetts, US), and with a Davis UV sensor, the > highest values I see are about 7. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/5053A2CD-A07C-4D5B-BBDB-E689C9F44B97%40gmail.com.
