Temperature (°C)

Lowest Minimum:                                                                                             -0.48 (on 4/5/25)

Highest Minimum:                                                                                            13.46 (on 29/5/25)

Mean Minimum:                                                                                                6.29

Minimum Anomaly:                                                                                           -0.36

Lowest Maximum:                                                                                             10.64 (on 4/5/25)

Highest Maximum:                                                                                            21.62 (on 10/5/25)

Mean Maximum:                                                                                                17.71

Maximum Anomaly:                                                                                           +2.85

Lowest Average:                                                                                                 5.08 (on 4/5/25)

Highest Average:                                                                                                17.09 (on 29/5/25)

Average Temperature:                                                                                        12.00

Average Anomaly:                                                                                               +1.24

Lowest Diurnal Temperature Range:                                                                 4.78 (on 19/5/25)

Highest Diurnal Temperature Range:                                                                19.24 (on 16/5/25)

Average Diurnal Temperature Range:                                                               11.32

Other Temperature Statistics

Single Figures Maximum Temperatures:                                                         0

Single Figures Minimum Temperatures:                                                          24

Double Figures Maximum Temperatures:                                                        24

Double Figures Minimum Temperatures:                                                         6

Maximum Temperatures Above 20°C:                                                              7

Number of Frosts

Ground Frosts:                                                                                                    12

Air Frosts:                                                                                                            1 (111.1% of 1991-2020 May average)

Rainfall (mm)

Total for May:                                                                                                      37.6 (74.9% of 1991-2020 May average)

Wettest Day:                                                                                                       8.0 (on 26/5/25)

Highest Hourly Total:                                                                                         4.8 (on 25/5/25 at 00:00)

Highest Ten Minute Total:                                                                                 2.2 (on 24/5/25 at 23:20)

Rain Days:                                                                                                           8 (74.3% of 1991-2020 May average)

Dry Days:                                                                                                            22

Longest Dry Spell                                                                                               22 days (1/5 to 22/5)

Longest Non-Dry Spell                                                                                      9 days (23/5 to 31/5)

Most Consecutive Rain Days                                                                            4 days (23/5 to 26/5 and 28/5 to 31/5)

Longest Period Without a Rain Day:                                                                22 days (1/5 to 22/5)

Wind Speed (mph)

Average Mean Wind Speed:                                                                              8.4 (91.6% of 1991-2020 May average)

Highest Mean Wind Speed:                                                                               28.4 (on 29/5/25)

Highest Wind Gust:                                                                                            42.7 (on 29/5/25)

Most Common Wind Direction                                                                          ENE

Pressure (mb)

Lowest Pressure:                                                                                                993.9 (on 24/5/25)

Average Pressure:                                                                                              1017.9

Highest Pressure:                                                                                               1032.1 (on 15/5/25)

Sunshine Total (hrs)

Total for May:                                                                                                      276.2 (145.8% of 1991-2020 May average)

Sunniest Day:                                                                                                      15.0 (on 17/5/25)

Sunless Days:                                                                                                      0

Conclusion

Overnight minimum temperatures in May 2025 were slightly below average with a very rare official air frost even being recorded, but the daytime maximum temperatures were very substantially warmer than average and because of that, May 2025 was a warmer than average month overall.

May 2025 was a substantially drier than average month in terms of the actual rainfall amounts with all of its recorded rainfall occurring within the final 9 days of the month, and it was also much drier than average in terms of the number of official rain days although the month ended on a much wetter note.

Finally, May 2025 was a substantially sunnier than average month and was our third sunnier than average month with February 2025 being this year's only duller than average month so far.

Only the second time in my records we have managed a mean max of 20c in May, exactly 20.0c on the nose. Lockdown 2020 holds the record at 20.4c. June used to often struggle to hit that 20 years ago.

I managed to get out fly fishing every week/weekend in May, that's the greatest sign of how good the month has been given I can mostly fish on either a Friday or at the weekend.

9.5/10, didn't quite hit the 30c, but that's splitting hairs really.

Swanston, just to my south, had 304 hours of sunshine which is 156% of their average. There were 15 days with over 10 hours and 3 days, 15th-17th with over 15 hours! There were no days without sunshine ☀️☀️☀️

It was warmer than normal with the Mean Temperature at 12.5 C which is 2.1 C above their average. The highest temperature was 22.4 C on the 11th 🌡🌡🌡

Again, another dry Spring month. Rain on the 23rd ended a 27-day dry spell. Only 7 days of rain at the end of the month with a total of 30.2mm which is only 51% of their average

🌧🌧🌧

Summary for May 2025 (Figures in brackets compared to the 61-90 averages for my nearest official station, Brogdale)

Temperature (°C):

Mean (1 minute)  13.9

Mean (min+max)  14.1 (+1.5)

Mean Minimum    9.6 (+1.7)

Mean Maximum    18.7 (+1.4)

Minimum          4.6 day 23

Maximum          26.1 day 31

Highest Minimum  14.2 day 30

Lowest Maximum  13.9 day 15

Air frosts      0

Rainfall (mm):

Total for month  12.8 (26%)

Wettest day      8.0 day 24

High rain rate  9.4 day 24

Rain days        5

Dry days        26

Wind (mph):

Highest Gust    15.0 day 27

Average Speed    0.7

Wind Run        543.1 miles

Gale days        0

Pressure (mb):

Maximum          1027.50 day 15

Minimum          1007.96 day 25

Days with snow falling        0

Days with snow lying at 0900  0