Białystok weather in May

In May, Białystok sees average daytime highs of 18°C and overnight lows near 8°C, with 67 mm of precipitation across 12 wet days and about 15.5 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 20°C by the end. The sky is clear or mostly clear about 23% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 42 min at the start of May to 16 h 18 min by month's end. Set against the rest of the year, May is Białystok's 3rd-clearest and 9th-windiest month. For the whole year in context, see Białystok's year-round climate.

Daytime high: 18°; 4th warmest
Overnight low: 8°; 8th coldest
Precipitation: 67 mm; 12 wet days
Daylight: 15 h 36 min; 3:36 AM – 7:11 PM
Cloud cover: 63%; 3rd clearest
Wind: 12 km/h; 9th windiest
Solar energy: 5.16 kWh/m²
Travel score: 5.6; out of 10

Białystok is city and capital of Podlaskie Voivodeship in eastern Poland.

Density: 2,899/km²; people per km²
Founded: 1691

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← April Białystok year-round climate June →Best places to visit in May

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 17°C in the first days to 20°C by the end.

A typical May day in Białystok reaches about 18°C in the afternoon and slips back to 8°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 25°C. Set against its neighbours, May runs about 6°C warmer than April and about 3°C cooler than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	17	17	17	17	17	17	17	18	18	18	18	18	18	18	18	18	18	19	19	19	19	19	19	19	20	20	20	20	20	20	20
Avg low (°C)	6	6	6	6	6	6	6	7	7	7	7	7	7	7	8	8	8	8	8	8	8	8	9	9	9	9	9	9	9	9	10

	Avg high (°C)	Avg low (°C)
1	17	6
2	17	6
3	17	6
4	17	6
5	17	6
6	17	6
7	17	6
8	18	7
9	18	7
10	18	7
11	18	7
12	18	7
13	18	7
14	18	7
15	18	8
16	18	8
17	18	8
18	19	8
19	19	8
20	19	8
21	19	8
22	19	8
23	19	9
24	19	9
25	20	9
26	20	9
27	20	9
28	20	9
29	20	9
30	20	9
31	20	10

How May really feels in Białystok

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Białystok weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-1° / -5°	40	10.4	7.3	7.9	0.0
Feb	1° / -5°	38	9.4	6.5	9.5	0.0
Mar	5° / -2°	41	10.4	4.1	11.5	0.4
Apr	13° / 3°	46	9.9	1.2	13.6	3.4
May	18° / 8°	67	12	0.1	15.5	5.6
Jun	22° / 11°	71	12.6	0	16.6	6.0
Jul	24° / 13°	84	13.2	0	16.2	6.4
Aug	23° / 13°	68	10.5	0	14.5	6.7
Sep	18° / 9°	58	9.6	0	12.4	5.5
Oct	11° / 4°	48	9.9	0.6	10.3	2.7
Nov	5° / 1°	41	9.7	3.1	8.4	0.3
Dec	1° / -3°	45	10.1	6.1	7.4	0.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	45	46	45	45	44	43	43	42	42	41	40	41	39	40	40	40	39	40	40	40	41	41	42	42	43	43	44	44	44	45	44
Cloudier (%)	55	54	55	55	56	57	57	58	58	59	60	59	61	60	60	60	61	60	60	60	59	59	58	58	57	57	56	56	56	55	56

	Clearer (%)	Cloudier (%)
1	45	55
2	46	54
3	45	55
4	45	55
5	44	56
6	43	57
7	43	57
8	42	58
9	42	58
10	41	59
11	40	60
12	41	59
13	39	61
14	40	60
15	40	60
16	40	60
17	39	61
18	40	60
19	40	60
20	40	60
21	41	59
22	41	59
23	42	58
24	42	58
25	43	57
26	43	57
27	44	56
28	44	56
29	44	56
30	45	55
31	44	56

Chance of precipitation in May

Any precipitation

Białystok gets around 67 mm of rain and snow over 12 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 39% and peaks near 42% on the wettest days, and about 0 day brings snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	33	34	35	36	37	37	38	39	39	40	41	41	41	42	42	42	41	41	41	41	40	40	39	39	38	38	38	37	37	37	37

	Rain chance (%)
1	33
2	34
3	35
4	36
5	37
6	37
7	38
8	39
9	39
10	40
11	41
12	41
13	41
14	42
15	42
16	42
17	41
18	41
19	41
20	41
21	40
22	40
23	39
24	39
25	38
26	38
27	38
28	37
29	37
30	37
31	37

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	99	99	99	98	98	98	97	97	96	95	95	94	93	92	91	91	90	90	89	88	88	87	87	86	85	85	85	83	83	83	82
Comfortable (%)	1	1	1	2	2	2	3	3	4	5	5	6	7	7	8	8	9	9	10	10	10	11	11	11	12	12	12	13	13	13	14
Humid (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	2	2	2	2	3	3	3	3	4	4	4	4

	Dry (%)	Comfortable (%)	Humid (%)
1	99	1	0
2	99	1	0
3	99	1	0
4	98	2	0
5	98	2	0
6	98	2	0
7	97	3	0
8	97	3	0
9	96	4	0
10	95	5	0
11	95	5	0
12	94	6	0
13	93	7	0
14	92	7	1
15	91	8	1
16	91	8	1
17	90	9	1
18	90	9	1
19	89	10	1
20	88	10	2
21	88	10	2
22	87	11	2
23	87	11	2
24	86	11	3
25	85	12	3
26	85	12	3
27	85	12	3
28	83	13	4
29	83	13	4
30	83	13	4
31	82	14	4

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	11
Feels	calm	calm	calm	calm	calm	calm	calm	calm	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	12	calm
2	12	calm
3	12	calm
4	12	calm
5	12	calm
6	12	calm
7	12	calm
8	12	calm
9	12	light breeze
10	12	light breeze
11	12	light breeze
12	12	light breeze
13	12	light breeze
14	12	light breeze
15	12	calm
16	12	calm
17	12	calm
18	12	calm
19	12	calm
20	12	calm
21	12	calm
22	12	calm
23	12	calm
24	12	calm
25	12	calm
26	12	calm
27	12	calm
28	12	calm
29	12	calm
30	12	calm
31	11	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 42 min at the start of May to 16 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 96 minutes over May. Sunrise moves from 4:04 AM to 3:17 AM, and sunset from 6:45 PM to 7:33 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	14.7	14.8	14.8	14.9	14.9	15.0	15.1	15.1	15.2	15.2	15.3	15.4	15.4	15.5	15.5	15.6	15.6	15.7	15.7	15.8	15.8	15.9	15.9	16.0	16.0	16.1	16.1	16.2	16.2	16.2	16.3
Sunrise (AM)	4:04	4:02	4:00	3:58	3:56	3:54	3:52	3:50	3:48	3:46	3:45	3:43	3:41	3:39	3:38	3:36	3:35	3:33	3:31	3:30	3:29	3:27	3:26	3:24	3:23	3:22	3:21	3:20	3:19	3:18	3:17
Sunset (PM)	6:45	6:47	6:49	6:51	6:52	6:54	6:56	6:58	6:59	7:01	7:03	7:04	7:06	7:08	7:09	7:11	7:13	7:14	7:16	7:17	7:19	7:20	7:22	7:23	7:25	7:26	7:28	7:29	7:30	7:32	7:33

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.7	4:04	6:45
2	14.8	4:02	6:47
3	14.8	4:00	6:49
4	14.9	3:58	6:51
5	14.9	3:56	6:52
6	15.0	3:54	6:54
7	15.1	3:52	6:56
8	15.1	3:50	6:58
9	15.2	3:48	6:59
10	15.2	3:46	7:01
11	15.3	3:45	7:03
12	15.4	3:43	7:04
13	15.4	3:41	7:06
14	15.5	3:39	7:08
15	15.5	3:38	7:09
16	15.6	3:36	7:11
17	15.6	3:35	7:13
18	15.7	3:33	7:14
19	15.7	3:31	7:16
20	15.8	3:30	7:17
21	15.8	3:29	7:19
22	15.9	3:27	7:20
23	15.9	3:26	7:22
24	16.0	3:24	7:23
25	16.0	3:23	7:25
26	16.1	3:22	7:26
27	16.1	3:21	7:28
28	16.2	3:20	7:29
29	16.2	3:19	7:30
30	16.2	3:18	7:32
31	16.3	3:17	7:33

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.16 kWh/m².

For context, solar energy here swings from a low near 0.44 kWh/m² to a high of 5.45 kWh/m² in June across the year — May's 5.16 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.9	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.1	5.1	5.2	5.2	5.2	5.3	5.3	5.3	5.3	5.4	5.4	5.4	5.5	5.5	5.5	5.5
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.9	Bright
2	4.9	Bright
3	4.9	Bright
4	4.9	Bright
5	5.0	Bright
6	5.0	Bright
7	5.0	Bright
8	5.0	Bright
9	5.0	Bright
10	5.0	Bright
11	5.0	Bright
12	5.0	Bright
13	5.1	Bright
14	5.1	Bright
15	5.1	Bright
16	5.1	Bright
17	5.1	Bright
18	5.2	Bright
19	5.2	Bright
20	5.2	Bright
21	5.3	Bright
22	5.3	Bright
23	5.3	Bright
24	5.3	Bright
25	5.4	Bright
26	5.4	Bright
27	5.4	Bright
28	5.5	Bright
29	5.5	Bright
30	5.5	Bright
31	5.5	Bright

Planning a trip in May

Is May a good time to visit Białystok?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.6

Sightseeing

4th-best month of the year

2.1

Beach & pool

4th-best month of the year

May is a reasonable time to visit Białystok for sightseeing.

What to pack for Białystok in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Białystok sees daytime highs around 18°C and nights near 8°C. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

UV index in Białystok in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Białystok peaks around June 22 at about 6 (high) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	3	4	5	6	6	6	4	2	1	0
Level	Low	Low	Moderate	Moderate	High	High	High	High	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	4	Moderate
May	5	High
Jun	6	High
Jul	6	High
Aug	6	High
Sep	4	Moderate
Oct	2	Low
Nov	1	Low
Dec	0	Low

Location & terrain

Where is Białystok?

Białystok sits at 53.1°N, 23.2°E, 135 m above sea level, in Poland. The nearest listed city is Łapy, 25 km away.

Topography around Białystok

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Białystok.

Within 3 km, the terrain around Białystok has only modest variations in elevation — a maximum elevation change of 57 m around an average of 143 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 111 m; within 80 km, only modest variations in elevation — a maximum elevation change of 182 m.

The land around Białystok is covered by artificial surfaces (59%) and trees (33%) within 3 km, trees (49%) and grassland (26%) within 16 km, and trees (39%), cropland (36%) and grassland (22%) within 80 km.

3 km

57 m

artificial surfaces 59%

16 km

111 m

trees 49%

80 km

182 m

trees 39%

treesgrasslandcroplandartificial surfaceswetland

← April Białystok year-round climate June →Best places to visit in May

May weather nearby: Łapy 25 km · Sokółka 38 km · Bielsk Podlaski 41 km · Hajnówka 52 km · Zambrów 64 km · Łomża 74 km · Grajewo 74 km · Grodno 75 km

Poland travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / E; 230 V · 50 Hz
Prices: ≈ 52% of US; price level, 2025
GDP per capita: $28,420; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 89%; of population, 2024
Homicide rate: 0.8; per 100k, 2023
Road deaths: 9.4; per 100k/yr, 2019
Income group: High; World Bank
English: Very high; EF EPI 600
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Białystok (53.1333°, 23.1643°, elevation 135 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	17	6
2	17	6
3	17	6
4	17	6
5	17	6
6	17	6
7	17	6
8	18	7
9	18	7
10	18	7
11	18	7
12	18	7
13	18	7
14	18	7
15	18	8
16	18	8
17	18	8
18	19	8
19	19	8
20	19	8
21	19	8
22	19	8
23	19	9
24	19	9
25	20	9
26	20	9
27	20	9
28	20	9
29	20	9
30	20	9
31	20	10

	Clearer (%)	Cloudier (%)
1	45	55
2	46	54
3	45	55
4	45	55
5	44	56
6	43	57
7	43	57
8	42	58
9	42	58
10	41	59
11	40	60
12	41	59
13	39	61
14	40	60
15	40	60
16	40	60
17	39	61
18	40	60
19	40	60
20	40	60
21	41	59
22	41	59
23	42	58
24	42	58
25	43	57
26	43	57
27	44	56
28	44	56
29	44	56
30	45	55
31	44	56

	Rain chance (%)
1	33
2	34
3	35
4	36
5	37
6	37
7	38
8	39
9	39
10	40
11	41
12	41
13	41
14	42
15	42
16	42
17	41
18	41
19	41
20	41
21	40
22	40
23	39
24	39
25	38
26	38
27	38
28	37
29	37
30	37
31	37

	Dry (%)	Comfortable (%)	Humid (%)
1	99	1	0
2	99	1	0
3	99	1	0
4	98	2	0
5	98	2	0
6	98	2	0
7	97	3	0
8	97	3	0
9	96	4	0
10	95	5	0
11	95	5	0
12	94	6	0
13	93	7	0
14	92	7	1
15	91	8	1
16	91	8	1
17	90	9	1
18	90	9	1
19	89	10	1
20	88	10	2
21	88	10	2
22	87	11	2
23	87	11	2
24	86	11	3
25	85	12	3
26	85	12	3
27	85	12	3
28	83	13	4
29	83	13	4
30	83	13	4
31	82	14	4

	Avg high (°C)	Avg low (°C)
1	17	6
2	17	6
3	17	6
4	17	6
5	17	6
6	17	6
7	17	6
8	18	7
9	18	7
10	18	7
11	18	7
12	18	7
13	18	7
14	18	7
15	18	8
16	18	8
17	18	8
18	19	8
19	19	8
20	19	8
21	19	8
22	19	8
23	19	9
24	19	9
25	20	9
26	20	9
27	20	9
28	20	9
29	20	9
30	20	9
31	20	10

	Clearer (%)	Cloudier (%)
1	45	55
2	46	54
3	45	55
4	45	55
5	44	56
6	43	57
7	43	57
8	42	58
9	42	58
10	41	59
11	40	60
12	41	59
13	39	61
14	40	60
15	40	60
16	40	60
17	39	61
18	40	60
19	40	60
20	40	60
21	41	59
22	41	59
23	42	58
24	42	58
25	43	57
26	43	57
27	44	56
28	44	56
29	44	56
30	45	55
31	44	56

	Rain chance (%)
1	33
2	34
3	35
4	36
5	37
6	37
7	38
8	39
9	39
10	40
11	41
12	41
13	41
14	42
15	42
16	42
17	41
18	41
19	41
20	41
21	40
22	40
23	39
24	39
25	38
26	38
27	38
28	37
29	37
30	37
31	37

	Dry (%)	Comfortable (%)	Humid (%)
1	99	1	0
2	99	1	0
3	99	1	0
4	98	2	0
5	98	2	0
6	98	2	0
7	97	3	0
8	97	3	0
9	96	4	0
10	95	5	0
11	95	5	0
12	94	6	0
13	93	7	0
14	92	7	1
15	91	8	1
16	91	8	1
17	90	9	1
18	90	9	1
19	89	10	1
20	88	10	2
21	88	10	2
22	87	11	2
23	87	11	2
24	86	11	3
25	85	12	3
26	85	12	3
27	85	12	3
28	83	13	4
29	83	13	4
30	83	13	4
31	82	14	4

	Avg high (°C)	Avg low (°C)
1	17	6
2	17	6
3	17	6
4	17	6
5	17	6
6	17	6
7	17	6
8	18	7
9	18	7
10	18	7
11	18	7
12	18	7
13	18	7
14	18	7
15	18	8
16	18	8
17	18	8
18	19	8
19	19	8
20	19	8
21	19	8
22	19	8
23	19	9
24	19	9
25	20	9
26	20	9
27	20	9
28	20	9
29	20	9
30	20	9
31	20	10

	Clearer (%)	Cloudier (%)
1	45	55
2	46	54
3	45	55
4	45	55
5	44	56
6	43	57
7	43	57
8	42	58
9	42	58
10	41	59
11	40	60
12	41	59
13	39	61
14	40	60
15	40	60
16	40	60
17	39	61
18	40	60
19	40	60
20	40	60
21	41	59
22	41	59
23	42	58
24	42	58
25	43	57
26	43	57
27	44	56
28	44	56
29	44	56
30	45	55
31	44	56

	Rain chance (%)
1	33
2	34
3	35
4	36
5	37
6	37
7	38
8	39
9	39
10	40
11	41
12	41
13	41
14	42
15	42
16	42
17	41
18	41
19	41
20	41
21	40
22	40
23	39
24	39
25	38
26	38
27	38
28	37
29	37
30	37
31	37

	Dry (%)	Comfortable (%)	Humid (%)
1	99	1	0
2	99	1	0
3	99	1	0
4	98	2	0
5	98	2	0
6	98	2	0
7	97	3	0
8	97	3	0
9	96	4	0
10	95	5	0
11	95	5	0
12	94	6	0
13	93	7	0
14	92	7	1
15	91	8	1
16	91	8	1
17	90	9	1
18	90	9	1
19	89	10	1
20	88	10	2
21	88	10	2
22	87	11	2
23	87	11	2
24	86	11	3
25	85	12	3
26	85	12	3
27	85	12	3
28	83	13	4
29	83	13	4
30	83	13	4
31	82	14	4