Best year time to visit South Portland (historical)

General weather information about South Portland (historical)

Average annual temperature is 12.3 °C

Absolute maximum temperature: 41.6 °C

Absolute minimum temperature: -11.7 °C

Number of sunny days: 172 days

Number of rainy days: 193 days

Look at detailed online map of South Portland (historical)

* Weather data for South Portland (historical) United States is based on climate observations for 2026 year

South Portland (historical) air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	11.7	13.4	17.8	26.4	30.4	31.7	35.9	41.6	33.3	27.0	17.6	16.1
Average daytime temperature (°C)	8.4	8.0	10.8	13.9	23.0	25.6	30.6	31.5	24.5	18.3	11.7	10.1
Average temperature (°C)	5.2	3.6	5.5	8.8	15.8	17.5	21.9	23.1	17.6	13.1	8.0	7.2
Average night temperature (°C)	2.8	0.6	2.1	5.0	10.3	11.5	15.0	16.7	12.7	9.9	5.4	5.3
Absolute minimum temperature (°C)	-4.0	-11.7	-1.7	-0.4	6.3	7.5	11.8	12.1	8.6	2.0	-1.8	0.7

South Portland (historical) monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	11.0	12.0	14.0	15.0	15.0	15.0	14.0	13.0	11.0	10.0	8.0
Daylight mean duration (h)	9.2	10.4	11.9	13.5	14.9	15.6	15.3	14.1	12.5	10.9	9.5	8.8
Daylight minimum duration (h)	8.0	9.0	11.0	12.0	14.0	15.0	14.0	13.0	11.0	10.0	9.0	8.0
Sunshine mean duration (h)	3.2	4.8	6.0	6.5	11.0	12.5	13.3	11.7	8.9	6.4	5.1	2.8
Precipitation (mm)	129	128	147	207	34	34	2	20	82	116	167	297
Sunny days	8	10	3	6	19	22	29	23	16	16	13	7
Rainy days	23	18	28	24	12	8	2	8	14	15	17	24
Snow days	0	0	0	0	0	0	0	0	0	0	0	0

South Portland (historical) - weather forecast by months

Best time to visit South Portland (historical):

The best time to visit South Portland (historical) during the most sunny months:

May — 11.0(h)
June — 12.5(h)
July — 13.3(h)
August — 11.7(h)

Months with the longest average daylight duration in South Portland (historical):

June — 15.6(h)
July — 15.3(h)

The largest precipitation sum in South Portland (historical) is at

March — 147(mm)

April — 207(mm)

November — 167(mm)

December — 297(mm)

Weather forecast in the closest to South Portland (historical) admin centers

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Frequently asked questions

When is the best time to visit South Portland (historical)?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit South Portland (historical).

What is the weather like in South Portland (historical)?

See average temperature, rainfall and daylight hours for South Portland (historical) by month in the table above.

How many sunny days does South Portland (historical) have?

The monthly weather statistics above show sunshine and rainfall patterns for South Portland (historical) throughout the year.