Best time to visit Pärnu

Re-score for me — drag the dial — every chart recolours live for your heat & sea limits 27°C · sea 29°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.

Sea feels bathtub at 29°C
26° strict 31° tolerant

Default 29 °C is the Beach Climate Index "bathtub" line (Morgan et al.) — where the sea stops being refreshing and starts feeling like a warm bath.

Saved to this browser. Changes update the strips below.
Sea temp cold <18° chilly 18–21° ideal 22–26° warm 27–28° bathtub 29–30° too warm ≥31°
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Sea Nov 2022 – Dec 2024 (?)
Day · avg daily high (?)
Night · avg overnight low (?)
UV index · On a typical day around midday, UV is about this (?)
112444321
On the sunniest 1 in 10 days, UV reaches this — and even higher
33
PM2.5 air quality · on a typical day (?)
677544445456
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
10121310776787811
June 8/10 feels 20°C (+2°C vs 1991-2020) · HCI 82/100
Day 21° · Night 13° 61% humidity 19 km/h wind 12 rain days (110h) 321h sun sea 20°C
Thermal 9
Sky 8
Rain 7
Wind 10

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.

Compare with another destination

Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.

Tours in Pärnu

6 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Pärnu).

  1. 1Pärnu Walking Tour From Medieval Town to Seaside Resortfrom $70
  2. 2The best of Pärnu walking tour2hfrom $159
  3. 3Enchanting Pärnu: A Journey Through Time & Tides2hfrom $99
  4. 4Engrossing Romantic Private Walking Tour in Kabli2hfrom $989
  5. 5Magical Pärnu: A Christmas Walk2hfrom $249
  6. 6Baltics eSIM (Instant Delivery)720hfrom $3

Last refreshed 2026-06-24.

Similar climatesKlaipėda93% · Palanga92% · Sopot89%

Other destinations with the most-alike year-round climate to Pärnu (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Pärnu's. Based on the 2020-2024 climatology, not this year's actual weather.

Month-by-month

Month Temp °C Feels °C Rain days Rain h Rain h/day Humidity Wind km/h Sun h UV Interest Score
Jan -3–0 -5 16 210 13.1 86% 27 40 — Quiet 3
Feb -3–1 -4 11 151 13.7 84% 27 81 1 Quiet 4
Mar -2–4 -1 12 133 11.1 74% 24 163 1 Quiet 6
Apr 2–9 5 10 126 12.6 66% 24 216 2 Quiet 6
May 7–15 12 8 100 12.5 57% 22 299 4 Quiet 8
Jun 13–21 20 12 110 9.2 61% 19 321 4 Quiet 8
Jul 15–21 20 17 214 12.6 66% 22 318 4 Quiet 5
Aug 15–21 20 16 185 11.6 72% 21 255 3 Peak 6
Sep 11–17 15 10 121 12.1 73% 22 206 2 Peak 7
Oct 7–11 7 14 172 12.3 79% 26 127 1 Quiet 5
Nov 2–5 1 16 215 13.4 85% 25 53 — Quiet 3
Dec -3–1 -4 14 198 14.1 86% 24 32 — Quiet 3

UV Index in Pärnu by Month

UV index in Pärnu peaks at 4 (moderate) in June, dropping to 0 (low) in January.

Best months in detail

June

8/10

13–21°C (feels 20°C) · 12 rain days (110h) · 321 sun hours · 61% humidity · Quiet crowd · UV 4 (moderate)

May

8/10

7–15°C (feels 12°C) · 8 rain days (100h) · 299 sun hours · 57% humidity · Quiet crowd · UV 4 (moderate)

September

7/10

11–17°C (feels 15°C) · 10 rain days (121h) · 206 sun hours · 73% humidity · Peak crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

Every month

Show the other 9 months in detail

January

3/10

-3–0°C (feels -5°C) · 16 rain days (210h) · 40 sun hours · 86% humidity · Quiet crowd

February

4/10

-3–1°C (feels -4°C) · 11 rain days (151h) · 81 sun hours · 84% humidity · Quiet crowd · UV 1 (low)

March

6/10

-2–4°C (feels -1°C) · 12 rain days (133h) · 163 sun hours · 74% humidity · Quiet crowd · UV 1 (low)

April

6/10

2–9°C (feels 5°C) · 10 rain days (126h) · 216 sun hours · 66% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

July

5/10

15–21°C (feels 20°C) · 17 rain days (214h) · 318 sun hours · 66% humidity · Quiet crowd · UV 4 (moderate)

August

6/10

15–21°C · 16 rain days (185h) · 255 sun hours · 72% humidity · Peak crowd · UV 3 (moderate)

October

5/10

7–11°C (feels 7°C) · 14 rain days (172h) · 127 sun hours · 79% humidity · Quiet crowd · UV 1 (low)

November

3/10

2–5°C (feels 1°C) · 16 rain days (215h) · 53 sun hours · 85% humidity · Quiet crowd

December

3/10

-3–1°C (feels -4°C) · 14 rain days (198h) · 32 sun hours · 86% humidity · Quiet crowd

Frequently asked questions about visiting Pärnu

When is the best time to visit Pärnu?

June is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 13–21°C (12 rainy days). The top three months by score are June, May, September.

What is the worst time to visit Pärnu?

January is the lowest-scoring month (3/10). Typical conditions: -3–0°C (16 rainy days).

When are crowds lowest in Pärnu?

Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in September. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.

Which months in Pärnu have good weather but fewer tourists?

May (climate 8/10, crowd index 0) and June (climate 8/10, crowd index 0) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.

What is the UV index in Pärnu by month?

UV peaks at 4 (moderate) in June and is lowest in January at 0 (low). Monthly peak values: Jan —, Feb 1, Mar 1, Apr 2, May 4, Jun 4, Jul 4, Aug 3, Sep 2, Oct 1, Nov —, Dec —.

What is the UV index in Pärnu in June?

June is the peak UV month in Pärnu, with a daily-peak UV index of 4 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.

How high can UV get in Pärnu on the sunniest days?

Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. September is the worst case: typical days average UV 2 (low), but the top 10% of days reach UV 3 (moderate) — and even higher. Months where the sunniest days routinely exceed the typical reading: April, September. Plan sun protection for the worst case, not the average.