Pärnu weather in May

In May, Pärnu sees average daytime highs of 16°C and overnight lows near 6°C, with 46 mm of precipitation across 9.5 wet days and about 16.4 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 18°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 h 18 min at the start of May to 17 h 24 min by month's end. Set against the rest of the year, May is Pärnu's 1st-clearest and 9th-windiest month. For the whole year in context, see Pärnu's year-round climate.

Daytime high
16°
4th warmest
Overnight low
8th coldest
Precipitation
46 mm
9.5 wet days
Daylight
16 h 30 min
4:05 AM – 8:32 PM
Cloud cover
57%
1st clearest
Wind
12 km/h
9th windiest
Solar energy
5.46 kWh/m²
Travel score
5.2
out of 10

Pärnu is city in Estonia.

Density
1,214/km²
people per km²
Founded
1251

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 14°C in the first days to 18°C by the end.

A typical May day in Pärnu reaches about 16°C in the afternoon and slips back to 6°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 23°C. Set against its neighbours, May runs about 6°C warmer than April and about 4°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1143
2144
3144
4144
5144
6154
7154
8154
9155
10155
11155
12165
13165
14165
15166
16166
17166
18176
19176
20176
21177
22177
23177
24177
25187
26187
27188
28188
29188
30188
31198

How May really feels in Pärnu

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

Pärnu weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -6°4811.18.36.80.0
Feb-1° / -7°439.58.38.90.0
Mar / -4°409.75.811.40.1
Apr10° / 42102142.3
May16° / 469.50.116.45.2
Jun20° / 10°8312.4017.85.9
Jul22° / 13°8312.3017.36.4
Aug21° / 12°8612.8015.16.0
Sep16° / 5610.7012.54.7
Oct / 6211.70.79.91.9
Nov / 5210.63.57.50.1
Dec / -3°5211.37.26.20.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of May, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
25050
35050
45050
55050
65050
75149
85149
95248
105248
115248
125347
135347
145347
155347
165248
175149
185149
195149
205149
215248
225248
235248
245248
255149
265149
275248
285248
295248
305248
315248

Chance of precipitation in May

Any precipitationSnow

Pärnu gets around 46 mm of rain and snow over 9.5 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 31% and peaks near 33% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1302
2301
3301
4301
5291
6291
7291
8291
9290
10290
11290
12290
13300
14300
15300
16310
17310
18320
19320
20330
21330
22330
23330
24330
25330
26320
27320
28320
29320
30320
31320

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 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
610000
79910
89910
99910
109910
119910
129820
139721
149721
159721
169631
179631
189631
199631
209541
219541
229442
239442
249352
259352
269352
279352
289262
299262
309073
319073

Wind in May

Winds average 12 km/h in May.

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

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 h 18 min at the start of May to 17 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 126 minutes over May. Sunrise moves from 4:40 AM to 3:38 AM, and sunset from 7:59 PM to 9:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.34:407:59
215.44:378:01
315.54:358:03
415.64:328:05
515.64:308:08
615.74:278:10
715.84:258:12
815.94:238:14
915.94:208:17
1016.04:188:19
1116.14:168:21
1216.24:138:23
1316.24:118:25
1416.34:098:28
1516.44:078:30
1616.54:058:32
1716.54:038:34
1816.64:018:36
1916.73:598:38
2016.73:578:40
2116.83:558:42
2216.93:538:44
2316.93:518:46
2417.03:498:48
2517.03:478:50
2617.13:468:52
2717.23:448:54
2817.23:438:55
2917.33:418:57
3017.33:408:59
3117.43:389:01

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.46 kWh/m².

For context, solar energy here swings from a low near 0.23 kWh/m² to a high of 5.72 kWh/m² in June across the year — May's 5.46 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
25.0Bright
35.0Bright
45.0Bright
55.1Bright
65.1Bright
75.2Bright
85.2Bright
95.3Bright
105.3Bright
115.3Bright
125.4Bright
135.4Bright
145.4Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Is May a good time to visit Pärnu?

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

5.2
Sightseeing
4th-best month of the year
0.9
Beach & pool
4th-best month of the year

May is a reasonable time to visit Pärnu for sightseeing.

What to pack for Pärnu in May

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

In May, Pärnu sees daytime highs around 16°C and nights near 6°C. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Pärnu in May

The nearest coast averages about 9°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 19°C and coldest in February near 0°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan2Bracing
Feb0Bracing
Mar1Bracing
Apr3Bracing
May9Bracing
Jun14Bracing
Jul18Cool
Aug19Cool
Sep15Cool
Oct11Bracing
Nov7Bracing
Dec4Bracing

UV index in Pärnu in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Pärnu peaks around June 19 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 5 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 19UV 6Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun6High
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Pärnu?

Pärnu sits at 58.4°N, 24.5°E, 6 m above sea level, in Estonia. The nearest listed city is Viljandi, 64 km away.

ViljandiMuhuHaapsaluRuhnuValmieraNõmmeValgaMustamäe

Topography around Pärnu

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

Within 3 km, the terrain around Pärnu has only modest variations in elevation — a maximum elevation change of 35 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 54 m; within 80 km, only modest variations in elevation — a maximum elevation change of 164 m.

The land around Pärnu is covered by water (28%), artificial surfaces (25%) and trees (24%) within 3 km, trees (33%) and water (27%) within 16 km, and trees (48%) and water (24%) within 80 km.

3 km
35 m
16 km
54 m
80 km
164 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Viljandi 64 km · Muhu 77 km · Haapsalu 83 km · Ruhnu 98 km · Valmiera 109 km · Nõmme 111 km · Valga 113 km · Mustamäe 114 km

Estonia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 66% of US
price level, 2025
GDP per capita
$34,418
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
1.5
per 100k, 2023
Road deaths
4.5
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 561
Religion
none 58%Orthodox 17%Protestant 9%other 3%

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 Pärnu (58.3859°, 24.4971°, elevation 6 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).