Monthly climate in Ilirska Bistrica, Slovenia

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Ilirska Bistrica features a oceanic climate (Cfb).Temperatures typically range between 1 °C (34 °F) and 21 °C (71 °F) through the year, but rarely can drop to -14 °C (7 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 1901 mm (74.9 inches) and receives 149 rainy days on the 1 mm (0.04 inches) threshold annually.Ilirska Bistrica enjoys an average of 3707 hours of sunshine throughout the year, and daylight varies from 8 hours 46 minutes to 15 hours 35 minutes per day.

Monthly average temperatures in Ilirska Bistrica, Slovenia §

The warmest months in Ilirska Bistrica are June, July and August, with daily mean temperatures ranging from 20 to 21 °C (68 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 4 °C (34 - 39 °F) throughout the day. On average each year, Ilirska Bistrica experiences 51 days above 25 °C (77.0 °F) and 65 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ilirska Bistrica, Slovenia.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 12°C
(53°F)
20°C
(69°F)
21°C
(71°F)
25°C
(77°F)
26°C
(79°F)
35°C
(95°F)
33°C
(91°F)
34°C
(94°F)
29°C
(85°F)
23°C
(74°F)
18°C
(65°F)
13°C
(56°F)
Mean maximum 10°C
(50°F)
14°C
(58°F)
19°C
(66°F)
22°C
(72°F)
24°C
(75°F)
29°C
(84°F)
31°C
(87°F)
32°C
(91°F)
27°C
(82°F)
21°C
(71°F)
16°C
(61°F)
12°C
(54°F)
Average high 5°C
(41°F)
8°C
(46°F)
11°C
(52°F)
15°C
(59°F)
18°C
(65°F)
24°C
(76°F)
26°C
(79°F)
27°C
(80°F)
21°C
(70°F)
16°C
(61°F)
10°C
(51°F)
6°C
(43°F)
Daily mean 1°C
(34°F)
4°C
(39°F)
6°C
(43°F)
10°C
(51°F)
14°C
(58°F)
20°C
(68°F)
21°C
(70°F)
21°C
(71°F)
16°C
(62°F)
12°C
(53°F)
7°C
(45°F)
3°C
(38°F)
Average low -2°C
(29°F)
0°C
(33°F)
2°C
(35°F)
6°C
(43°F)
10°C
(51°F)
15°C
(60°F)
16°C
(62°F)
17°C
(63°F)
12°C
(54°F)
8°C
(47°F)
5°C
(41°F)
0°C
(33°F)
Mean minimum -8°C
(18°F)
-6°C
(21°F)
-5°C
(24°F)
-1°C
(31°F)
5°C
(41°F)
10°C
(49°F)
12°C
(54°F)
12°C
(54°F)
6°C
(42°F)
3°C
(38°F)
-2°C
(29°F)
-6°C
(22°F)
Minimum -14°C
(8°F)
-11°C
(12°F)
-14°C
(7°F)
-7°C
(20°F)
3°C
(37°F)
8°C
(46°F)
11°C
(51°F)
10°C
(50°F)
4°C
(39°F)
2°C
(35°F)
-5°C
(23°F)
-8°C
(18°F)

Compare climate in Ilirska Bistrica with other places

Compare temperature, precipitation, sunshine, UV index in Ilirska Bistrica, Slovenia with other places around the world.

Monthly average precipitation in Ilirska Bistrica, Slovenia §

Ilirska Bistrica usually has the most precipitation in May, September and November, with an average of 15 rainy days and 217 mm (8.5 inches) of precipitation per month.The driest months in Ilirska Bistrica are January, June and July. On average, 106 mm (4.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ilirska Bistrica, Slovenia.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 91 (3.6) 175 (6.9) 128 (5.0) 136 (5.4) 214 (8.4) 110 (4.3) 117 (4.6) 120 (4.7) 219 (8.6) 170 (6.7) 217 (8.5) 205 (8.1)
Average precipitation days (≥ 1 mm) 8 13 11 11 21 11 14 12 12 11 13 12

Monthly sunshine hours in Ilirska Bistrica, Slovenia §

The sunniest months in Ilirska Bistrica are June, July and August, when the sun shines an average of 13 hours 28 minutes a day.Least sunny months in Ilirska Bistrica: January, November and December receive an average of 6 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ilirska Bistrica, Slovenia.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 179 223 312 336 365 413 429 397 321 294 221 211
Mean daily daylight hours 9h 9m 10h 23m 11h 56m 13h 32m 14h 53m 15h 35m 15h 13m 14h 0m 12h 29m 10h 53m 9h 29m 8h 46m

Solar UV radiation in Ilirska Bistrica, Slovenia §

Ilirska Bistrica experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure.January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Ilirska Bistrica UV Index data.

Average daily maximum UV levels by month for Ilirska Bistrica, Slovenia.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 3 5 7 8 9 9 8 7 5 3 2