Portland, Maine vs Johnston, Rhode Island Climate
95%matchPortland and Johnston are a 95% climate match. Compared with Portland, Johnston has the same summer highs and 4°F (2°C) milder winter nights.
Portland gets 47 in (1187 mm) of rain a year and Johnston 49 in (1244 mm). July is the warmest month in both, with highs of 80°F (27°C) in Portland and 82°F (28°C) in Johnston.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
PortlandJohnstonsolid = high, dashed = low
Rain (in per month)
PortlandJohnston
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Portland | Johnston | Portland | Johnston | Portland | Johnston | |
| Jan | 32°F(0°C) | 37°F(3°C) | 14°F(-10°C) | 19°F(-7°C) | 3.6 in(91 mm) | 3.8 in(96 mm) |
| Feb | 36°F(2°C) | 38°F(4°C) | 16°F(-9°C) | 20°F(-7°C) | 3.3 in(85 mm) | 3.5 in(88 mm) |
| Mar | 43°F(6°C) | 47°F(8°C) | 25°F(-4°C) | 27°F(-3°C) | 4.3 in(108 mm) | 4.8 in(123 mm) |
| Apr | 55°F(13°C) | 57°F(14°C) | 35°F(2°C) | 37°F(3°C) | 4.6 in(116 mm) | 4.3 in(108 mm) |
| May | 66°F(19°C) | 68°F(20°C) | 45°F(7°C) | 46°F(8°C) | 3.7 in(95 mm) | 3.2 in(82 mm) |
| Jun | 75°F(24°C) | 76°F(25°C) | 54°F(12°C) | 55°F(13°C) | 3.6 in(92 mm) | 4.1 in(104 mm) |
| Jul | 80°F(27°C) | 82°F(28°C) | 60°F(16°C) | 62°F(17°C) | 3.1 in(80 mm) | 3.7 in(94 mm) |
| Aug | 79°F(26°C) | 81°F(27°C) | 59°F(15°C) | 62°F(16°C) | 3.1 in(79 mm) | 4.1 in(105 mm) |
| Sep | 72°F(22°C) | 75°F(24°C) | 51°F(11°C) | 54°F(12°C) | 3.3 in(84 mm) | 3.8 in(97 mm) |
| Oct | 60°F(16°C) | 64°F(18°C) | 40°F(5°C) | 42°F(6°C) | 5.2 in(132 mm) | 4.6 in(118 mm) |
| Nov | 48°F(9°C) | 53°F(12°C) | 31°F(0°C) | 34°F(1°C) | 4.2 in(107 mm) | 4.3 in(110 mm) |
| Dec | 38°F(3°C) | 43°F(6°C) | 22°F(-6°C) | 25°F(-4°C) | 4.6 in(118 mm) | 4.7 in(119 mm) |
1991–2020 averages, by calendar month.