St. Peter Port (Guernsey) vs Tehran (Iran): Temperature, Rainfall and Sunshine

Across the 12 monthly averages, St. Peter Port (Guernsey) is warmer in 4 months and Tehran (Iran) in 8; 0 months are equal at the displayed precision.

Key monthly differences

Warmest months (mean temperature) (°C)

St. Peter Port: August: 16.88
Tehran: July: 31.79

Coolest months (mean temperature) (°C)

St. Peter Port: February: 8.33
Tehran: January: 2.84

Months with the lowest daily rainfall average (mm/day)

St. Peter Port: July: 1.09
Tehran: August: 0.00

Months with the most daily sunshine (hours/day)

St. Peter Port: July: 12.35
Tehran: June: 12.84

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Climate Compare: St. Peter Port (Guernsey)

Climate comparison questions

When are the temperatures most similar and most different?

The smallest difference in monthly mean temperature is 1.88 °C (March); the largest is 15.59 °C (July).

How much do temperatures vary across the year?

The difference between the warmest and coolest monthly means is 8.55 °C in St. Peter Port (Guernsey) and 28.95 °C in Tehran (Iran). This describes seasonal variation, not the range between daytime highs and nighttime lows.

Which location has more rainfall?

St. Peter Port (Guernsey) has a higher daily rainfall average in 12 months and Tehran (Iran) in 0; 0 months are equal at the displayed precision. Rainfall amounts do not tell us how many days it rains.

Which location has more sunshine?

St. Peter Port (Guernsey) has more average sunshine hours per day in 0 months and Tehran (Iran) in 12; 0 months are equal at the displayed precision. Sunshine duration is different from daylight duration.

Data and measurement guide

Daily values are averaged separately for each calendar month over the saved reference period. Temperatures are daily means, not daytime highs. Rainfall is an average daily amount, not a monthly total; sunshine is average hours per day. These historical averages are not a weather forecast. Each location’s reference period is listed below and may differ.

St. Peter Port (Guernsey) — Reference period: 2013–2023
Tehran (Iran) — Reference period: 2013–2023

Source: Open-Meteo Historical Weather API

Monthly climate data

Difference: Tehran (Iran) minus St. Peter Port (Guernsey)

Temperature °C

Month	St. Peter Port	Tehran	+/-
Jan	8.99	2.84	-6.14
Feb	8.33	4.96	-3.38
Mar	8.64	10.52	1.88
Apr	9.71	16.25	6.54
May	11.73	22.79	11.06
Jun	14.13	29.23	15.10
Jul	16.20	31.79	15.59
Aug	16.88	30.07	13.18
Sep	16.56	26.24	9.68
Oct	14.91	18.42	3.52
Nov	12.13	9.65	-2.49
Dec	10.51	4.77	-5.74
⌀ Month	12.39	17.29	4.90

Average sunshine (hours/day)

Month	St. Peter Port	Tehran	+/-
Jan	3.99	8.15	4.16
Feb	5.74	8.74	2.99
Mar	7.54	9.47	1.92
Apr	10.39	10.56	0.17
May	11.54	12.07	0.53
Jun	11.89	12.84	0.95
Jul	12.35	12.80	0.45
Aug	10.71	12.25	1.54
Sep	9.45	11.06	1.61
Oct	6.99	9.83	2.84
Nov	4.96	7.93	2.97
Dec	3.67	7.76	4.09
⌀ Month	8.27	10.29	2.02

Average daily rainfall (mm/day)

Month	St. Peter Port	Tehran	+/-
Jan	4.02	0.96	-3.06
Feb	3.03	1.17	-1.86
Mar	2.30	1.54	-0.75
Apr	1.37	1.11	-0.26
May	1.46	0.41	-1.05
Jun	1.49	0.04	-1.45
Jul	1.09	0.03	-1.06
Aug	2.13	0.00	-2.13
Sep	1.93	0.02	-1.91
Oct	4.05	0.59	-3.46
Nov	4.70	1.38	-3.32
Dec	4.30	1.03	-3.27
⌀ Month	2.66	0.69	-1.97

Snow (mm)

Month	St. Peter Port	Tehran	+/-
Jan	0.27	1.39	1.12
Feb	0.23	1.10	0.88
Mar	0.65	0.31	-0.34
Apr	0.02	0.01	-0.01
May	0.00	0.00	0.00
Jun	0.00	0.00	0.00
Jul	0.00	0.00	0.00
Aug	0.00	0.00	0.00
Sep	0.00	0.00	0.00
Oct	0.00	0.00	0.00
Nov	0.02	0.54	0.52
Dec	0.08	0.41	0.33
⌀ Month	0.10	0.31	0.21