Rosetta climate: monthly averages: annual mean temperature 21.4 C; warmest month Aug (27.8 C); coldest month Jan (15.0 C).
Annual mean temperature: 21.4 C
Warmest month: Aug (27.8 C)
Coldest month: Jan (15.0 C)
Wettest month: Jan (1.17 mm/day)
All-time record high: 39.3 C
All-time record low: 8.3 C
A consolidated reference for Rosetta climate: monthly averages, rebuilt from public data on a schedule. Expect 15.0 C at the coldest (Jan) and 27.8 C at the warmest (Aug) — a 12.8 C spread. Expect a wet season rather than rain year-round: Jan brings 1.17 mm/day against 0.00 mm/day in Aug. Taken together that is roughly 144 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. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 21.4 C
Warmest month Aug (27.8 C)
Coldest month Jan (15.0 C)
Wettest month Jan (1.17 mm/day)
All-time record high 39.3 C
All-time record low 8.3 C
Annual precipitation 146 mm / year
Coordinates 31.39951, 30.41718
Population 301,795
Average monthly temperature and rainfall in Rosetta
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
15.0
1.17
25.0
8.3
Feb
15.2
0.84
29.3
9.2
Mar
16.7
0.35
33.7
9.0
Apr
19.0
0.37
35.7
12.8
May
22.3
0.03
36.7
15.0
Jun
25.3
0.01
37.4
18.3
Jul
27.1
0.01
39.3
21.7
Aug
27.8
0.00
36.8
23.2
Sep
26.5
0.01
37.4
20.6
Oct
24.1
0.31
35.8
17.4
Nov
20.7
0.60
31.8
13.8
Dec
17.2
1.05
28.5
10.0
What the Rosetta climate table shows
Values are multi-decadal climatological averages for the 31.39951, 30.41718 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
Does Rosetta get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.