Liepāja weather in September

In September, Liepāja sees average daytime highs of 16°C and overnight lows near 12°C, with 68 mm of rain across 11.3 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 14°C by the end. The sky is clear or mostly clear about 24% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 42 min at the start of September to 11 h 18 min by month's end. Set against the rest of the year, September is Liepāja's 6th-clearest and 7th-windiest month. For the whole year in context, see Liepāja's year-round climate.

Daytime high
16°
4th warmest
Overnight low
12°
9th coldest
Rainfall
68 mm
11.3 wet days
Daylight
12 h 30 min
6:16 AM – 6:44 PM
Cloud cover
62%
6th clearest
Wind
19 km/h
7th windiest
Solar energy
2.85 kWh/m²
Travel score
4.8
out of 10

Liepāja is state city in western Latvia, along the Baltic Sea.

Air quality
Moderate
PM2.5 13.4 µg/m³ · 2019
Density
991/km²
people per km²
Founded
1625

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Liepāja reaches about 16°C in the afternoon and slips back to 12°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 19°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11814
21813
31813
41813
51813
61813
71713
81713
91712
101712
111712
121712
131612
141612
151612
161612
171611
181611
191611
201511
211511
221511
231511
241510
251510
261410
271410
281410
291410
301410

How September really feels in Liepāja

Once humidity and wind are folded in, September 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

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

Liepāja weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°5412.16.67.20.0
Feb / -3°43105.89.10.0
Mar / -1°389.43.811.40.0
Apr / 337.90.813.91.7
May14° / 398.6016.14.1
Jun17° / 12°539.7017.35.5
Jul20° / 15°6711.1016.86.3
Aug20° / 15°7913.1014.96.0
Sep16° / 12°6811.3012.54.8
Oct11° / 8314.20.410.12.3
Nov / 6613.81.87.90.5
Dec / 6413.95.76.70.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24654
34654
44654
54555
64555
74555
84555
94456
104456
114456
124456
134456
144357
154357
164456
174357
184456
194456
204357
214456
224456
234456
244357
254258
264258
274258
284258
294060
303961

Chance of precipitation in September

Any precipitation

Liepāja gets around 68 mm of rain over 11.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
144
244
343
443
542
642
741
841
940
1040
1139
1239
1338
1437
1537
1636
1736
1835
1935
2035
2135
2235
2336
2436
2536
2637
2738
2838
2939
3040

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 76% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
154406
256395
357385
459374
560364
662353
764333
866322
967312
1069292
1171272
1273261
1375241
1476231
1578211
1679201
1780191
1881181
1984160
2085150
2186140
2286140
2387130
2488120
2589110
2689110
2790100
2890100
299190
309280

Wind in September

Winds average 19 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2320light breeze
2420light breeze
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920breezy
3020breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 42 min at the start of September to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 144 minutes over September. Sunrise moves from 5:45 AM to 6:45 AM, and sunset from 7:26 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:457:26
213.65:477:23
313.55:497:20
413.45:527:18
513.45:547:15
613.35:567:12
713.25:587:09
813.16:007:07
913.06:027:04
1013.06:047:01
1112.96:066:58
1212.86:086:56
1312.76:106:53
1412.66:126:50
1512.56:146:47
1612.56:166:44
1712.46:186:41
1812.36:206:39
1912.26:226:36
2012.16:256:33
2112.16:276:30
2212.06:296:27
2311.96:316:25
2411.86:336:22
2511.76:356:19
2611.76:376:16
2711.66:396:13
2811.56:416:11
2911.46:436:08
3011.36:456:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.85 kWh/m².

For context, solar energy here swings from a low near 0.32 kWh/m² to a high of 5.98 kWh/m² in June across the year — September's 2.85 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.5Moderate
33.5Moderate
43.4Moderate
53.4Moderate
63.3Moderate
73.3Moderate
83.2Moderate
93.1Moderate
103.1Moderate
113.0Moderate
123.0Moderate
132.9Moderate
142.9Moderate
152.8Moderate
162.8Moderate
172.8Moderate
182.7Moderate
192.7Moderate
202.6Moderate
212.6Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.4Moderate
262.4Moderate
272.3Moderate
282.3Moderate
292.2Moderate
302.2Moderate
Planning a trip in September

Is September a good time to visit Liepāja?

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

4.8
Sightseeing
4th-best month of the year
0.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Liepāja for sightseeing.

What to pack for Liepāja in September

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

In September, Liepāja sees daytime highs around 16°C and nights near 12°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Liepāja in September

The nearest coast averages about 16°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in August at about 18°C and coldest in March near 2°C.

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

0°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar2Bracing
Apr4Bracing
May8Bracing
Jun13Bracing
Jul17Cool
Aug18Cool
Sep16Cool
Oct12Bracing
Nov9Bracing
Dec6Bracing

UV index in Liepāja in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Liepāja peaks around June 18 at about 6 (high) — a little sun protection helps at midday. It bottoms out near December 20 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 18UV 6Dec 20UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May5Moderate
Jun6High
Jul5Moderate
Aug5High
Sep3Moderate
Oct1Low
Nov1Low
Dec0Low

Air quality in Liepāja in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Liepāja is worst in April — around 17 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (November, 10 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Liepāja's WHO annual average of 13.4 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1316 µg/m³Nov 2010 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr17Moderate
May14Moderate
Jun15Moderate
Jul14Moderate
Aug15Moderate
Sep14Moderate
Oct12Moderate
Nov10Good
Dec11Good
Location & terrain

Where is Liepāja?

Liepāja sits at 56.5°N, 21.0°E, 6 m above sea level, in Latvia. The nearest listed city is Palanga, 65 km away.

PalangaKretingaKuldīgaPlungeMazeikiaiKlaipėdaGargždaiTelsiai

Topography around Liepāja

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

Within 3 km, the terrain around Liepāja has only modest variations in elevation — a maximum elevation change of 19 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 59 m; within 80 km, only modest variations in elevation — a maximum elevation change of 206 m.

The land around Liepāja is covered by water (49%) and artificial surfaces (25%) within 3 km, water (50%) and trees (22%) within 16 km, and trees (36%), water (28%) and cropland (20%) within 80 km.

3 km
19 m
16 km
59 m
80 km
206 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Palanga 65 km · Kretinga 70 km · Kuldīga 78 km · Plunge 84 km · Mazeikiai 84 km · Klaipėda 89 km · Gargždai 92 km · Telsiai 96 km

Latvia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 57% of US
price level, 2025
GDP per capita
$26,312
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2.5
per 100k, 2023
Road deaths
8.1
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 599
Religion
Lutheran 36%unspecified/none 24%Roman Catholic 20%Orthodox 19%

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 Liepāja (56.5047°, 21.0109°, 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).