Mariestad has a maritime climate influenced by its position on lake Vänern and the relative proximity to the North Atlantic. The town has warmer weather than elsewhere in western Sweden due to the influence of Vänern counterbalancing the low-pressure systems from further west. Mariestad is also shielded behind the archipelago and the peninsula to its west, which makes it warmer than areas further southwest on the lake shore. This leads to sunny summers with average afternoon temperatures being about 23 °C (73 °F). Summer nights are very mild by inland standards due to the lake influence. Winters are often mild with infrequent snow cover with the lake being large enough to provide further moderation of cold snaps compared to towns on the east coast like Norrköping and Nyköping on the same latitude. Vänern often remains in a liquid state during winters due to mild temperatures.
| Climate data for Mariestad (1991-2020; extremes since 1958) |
| Month |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| Record high °C (°F) |
10.7
(51.3) |
13.1
(55.6) |
18.3
(64.9) |
27.2
(81.0) |
30.0
(86.0) |
31.0
(87.8) |
34.3
(93.7) |
34.7
(94.5) |
27.2
(81.0) |
22.6
(72.7) |
17.8
(64.0) |
12.5
(54.5) |
34.7
(94.5) |
| Mean maximum °C (°F) |
7.4
(45.3) |
7.4
(45.3) |
12.4
(54.3) |
19.7
(67.5) |
25.3
(77.5) |
27.4
(81.3) |
29.1
(84.4) |
28.0
(82.4) |
22.8
(73.0) |
16.4
(61.5) |
11.4
(52.5) |
8.4
(47.1) |
30.4
(86.7) |
| Mean daily maximum °C (°F) |
1.7
(35.1) |
1.9
(35.4) |
5.6
(42.1) |
11.6
(52.9) |
17.0
(62.6) |
20.5
(68.9) |
22.8
(73.0) |
21.8
(71.2) |
17.1
(62.8) |
11.0
(51.8) |
6.0
(42.8) |
3.1
(37.6) |
11.7
(53.1) |
| Daily mean °C (°F) |
−0.5
(31.1) |
−0.7
(30.7) |
1.9
(35.4) |
6.7
(44.1) |
11.7
(53.1) |
15.5
(59.9) |
17.9
(64.2) |
17.0
(62.6) |
13.0
(55.4) |
7.9
(46.2) |
3.8
(38.8) |
0.8
(33.4) |
7.9
(46.2) |
| Mean daily minimum °C (°F) |
−2.7
(27.1) |
−3.2
(26.2) |
−1.3
(29.7) |
2.6
(36.7) |
7.2
(45.0) |
11.1
(52.0) |
13.7
(56.7) |
13.1
(55.6) |
9.5
(49.1) |
5.2
(41.4) |
1.8
(35.2) |
−1.4
(29.5) |
4.7
(40.5) |
| Mean minimum °C (°F) |
−12.0
(10.4) |
−12.1
(10.2) |
−8.5
(16.7) |
−3.4
(25.9) |
1.4
(34.5) |
6.4
(43.5) |
9.7
(49.5) |
8.4
(47.1) |
3.2
(37.8) |
−2.0
(28.4) |
−5.3
(22.5) |
−10.2
(13.6) |
−15.4
(4.3) |
| Record low °C (°F) |
−26.5
(−15.7) |
−31.5
(−24.7) |
−23.1
(−9.6) |
−12.5
(9.5) |
−3.3
(26.1) |
1.1
(34.0) |
4.5
(40.1) |
2.2
(36.0) |
−2.4
(27.7) |
−11.0
(12.2) |
−18.7
(−1.7) |
−22.2
(−8.0) |
−31.5
(−24.7) |
| Average precipitation mm (inches) |
40.5
(1.59) |
35.5
(1.40) |
28.1
(1.11) |
35.3
(1.39) |
48.4
(1.91) |
72.8
(2.87) |
72.4
(2.85) |
72.2
(2.84) |
53.2
(2.09) |
58.2
(2.29) |
50.9
(2.00) |
46.7
(1.84) |
614.2
(24.18) |
| Source: SMHI Open Data[4] |
| Climate data for Mariestad (2002–2021 averages & extremes) |
| Month |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| Record high °C (°F) |
10.7
(51.3) |
13.1
(55.6) |
18.3
(64.9) |
23.9
(75.0) |
30.0
(86.0) |
31.0
(87.8) |
34.3
(93.7) |
34.7
(94.5) |
27.2
(81.0) |
22.6
(72.7) |
17.8
(64.0) |
12.5
(54.5) |
34.7
(94.5) |
| Mean maximum °C (°F) |
7.4
(45.3) |
7.7
(45.9) |
12.7
(54.9) |
19.2
(66.6) |
25.3
(77.5) |
28.0
(82.4) |
29.4
(84.9) |
28.1
(82.6) |
23.5
(74.3) |
16.6
(61.9) |
11.9
(53.4) |
8.5
(47.3) |
30.8
(87.4) |
| Mean daily maximum °C (°F) |
1.6
(34.9) |
1.9
(35.4) |
5.8
(42.4) |
12.0
(53.6) |
17.1
(62.8) |
21.2
(70.2) |
23.2
(73.8) |
21.9
(71.4) |
17.6
(63.7) |
11.1
(52.0) |
6.4
(43.5) |
3.2
(37.8) |
11.9
(53.5) |
| Daily mean °C (°F) |
−0.7
(30.7) |
−0.7
(30.7) |
2.3
(36.1) |
7.4
(45.3) |
12.3
(54.1) |
16.4
(61.5) |
18.6
(65.5) |
17.6
(63.7) |
13.8
(56.8) |
8.2
(46.8) |
4.3
(39.7) |
1.2
(34.2) |
8.4
(47.1) |
| Mean daily minimum °C (°F) |
−2.9
(26.8) |
−3.2
(26.2) |
−1.3
(29.7) |
2.7
(36.9) |
7.5
(45.5) |
11.5
(52.7) |
14.0
(57.2) |
13.2
(55.8) |
9.9
(49.8) |
5.3
(41.5) |
2.2
(36.0) |
−0.9
(30.4) |
4.8
(40.7) |
| Mean minimum °C (°F) |
−12.2
(10.0) |
−11.4
(11.5) |
−8.3
(17.1) |
−2.8
(27.0) |
1.8
(35.2) |
7.0
(44.6) |
10.1
(50.2) |
8.4
(47.1) |
3.6
(38.5) |
−1.8
(28.8) |
−5.3
(22.5) |
−9.1
(15.6) |
−15.2
(4.6) |
| Record low °C (°F) |
−24.4
(−11.9) |
−22.4
(−8.3) |
−20.0
(−4.0) |
−7.0
(19.4) |
−1.3
(29.7) |
4.2
(39.6) |
7.8
(46.0) |
6.2
(43.2) |
−0.1
(31.8) |
−8.5
(16.7) |
−11.6
(11.1) |
−22.2
(−8.0) |
−24.4
(−11.9) |
| Average precipitation mm (inches) |
39.8
(1.57) |
33.5
(1.32) |
29.7
(1.17) |
29.5
(1.16) |
54.7
(2.15) |
70.8
(2.79) |
78.0
(3.07) |
83.7
(3.30) |
50.6
(1.99) |
55.6
(2.19) |
52.0
(2.05) |
44.8
(1.76) |
622.7
(24.52) |
| Source 1: SMHI Open Data - Precipitation for Mariestad[5] |
| Source 2: SMHI Open Data - Temperature for Mariestad[6] |
