Everything below is collected in one spot so you do not have to cross-check Palermo climate: monthly averages by hand. The gap between Feb and Aug is 16.3 C here: 10.1 C against 26.4 C. No month dominates: the wettest is Jan at 3.13 mm/day, the driest Jul at 0.23 mm/day. Taken together that is roughly 716 mm of rain a year for the grid cell. Every run re-reads the source and only rewrites this page when a figure actually changed. Exact monthly values are in the table; links below cover adjacent locations and years.
Annual mean temperature 17.5 C
Warmest month Aug (26.4 C)
Coldest month Feb (10.1 C)
Wettest month Jan (3.13 mm/day)
All-time record high 38.8 C
All-time record low 1.9 C
Annual precipitation 712 mm / year
Coordinates 38.1166, 13.3636
Population 648,260
Average monthly temperature and rainfall in Palermo
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
10.3
3.13
18.6
2.1
Feb
10.1
3.06
20.5
2.2
Mar
11.9
2.40
25.0
3.4
Apr
14.5
1.88
27.4
5.2
May
18.1
0.87
34.3
9.7
Jun
22.7
0.61
38.8
12.6
Jul
26.0
0.23
38.2
16.3
Aug
26.4
0.43
38.1
18.2
Sep
23.0
2.03
35.1
14.6
Oct
19.6
2.93
30.6
10.6
Nov
15.4
2.91
24.4
6.7
Dec
11.8
3.07
20.6
1.9
What the Palermo climate table shows
Values are multi-decadal climatological averages for the 38.1166, 13.3636 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
Is Palermo climate data a forecast?
No. These are multi-decadal averages for the grid cell, not a prediction for any particular year.
Why do the numbers differ from a weather app?
An app shows one location on one day. These are long-run averages, so they smooth out single hot or cold spells.