Lahti weather in August

In August, Lahti sees average daytime highs of 20°C and overnight lows near 12°C, with 68 mm of rain across 11.7 wet days and about 15.5 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 15% of the time in August, and the air most often feels dry.

Daylight stretches from about 16 h 54 min at the start of August to 14 h 06 min by month's end. Set against the rest of the year, August is Lahti's 5th-clearest and 11th-windiest month. For the whole year in context, see Lahti's year-round climate.

Daytime high: 20°; 2nd warmest
Overnight low: 12°; 11th coldest
Rainfall: 68 mm; 11.7 wet days
Daylight: 15 h 30 min; 4:36 AM – 8:07 PM
Cloud cover: 69%; 5th clearest
Wind: 10 km/h; 11th windiest
Solar energy: 3.79 kWh/m²
Travel score: 5.8; out of 10

Air quality: Excellent; PM2.5 4.3 µg/m³ · 2019

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

← July Lahti year-round climate September →Best places to visit in August

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 18°C by the end.

A typical August day in Lahti reaches about 20°C in the afternoon and slips back to 12°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 24°C. Set against its neighbours, August runs about 2°C cooler than July and about 5°C warmer than September.

	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)	22	22	21	21	21	21	21	21	21	21	21	20	20	20	20	20	20	20	19	19	19	19	19	19	18	18	18	18	18	18	17
Avg low (°C)	13	13	13	13	13	13	13	13	12	12	12	12	12	12	12	12	12	11	11	11	11	11	11	11	11	11	10	10	10	10	10

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

How August really feels in Lahti

Once humidity and wind are folded in, August 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

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

Lahti weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-3° / -8°	41	10.3	10.7	6.1	0.0
Feb	-3° / -9°	34	8.2	8.7	8.5	0.0
Mar	1° / -6°	33	8.4	8.2	11.3	0.0
Apr	8° / -1°	35	8.8	3.4	14.2	1.3
May	15° / 5°	48	10	0.2	17	4.3
Jun	19° / 10°	75	12.3	0	18.7	5.5
Jul	21° / 13°	76	12.4	0	18	6.1
Aug	20° / 12°	68	11.7	0	15.5	5.8
Sep	14° / 7°	51	9.8	0	12.6	4.0
Oct	7° / 3°	56	11.1	1.6	9.7	1.0
Nov	2° / -1°	50	10.8	5.5	6.9	0.0
Dec	-1° / -5°	48	11.6	9.9	5.3	0.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 67%.

	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 (%)	39	38	37	37	37	35	35	35	34	34	34	34	35	34	34	34	34	33	33	33	32	32	31	31	31	30	29	28	28	28	28
Cloudier (%)	61	62	63	63	63	65	65	65	66	66	66	66	65	66	66	66	66	67	67	67	68	68	69	69	69	70	71	72	72	72	72

	Clearer (%)	Cloudier (%)
1	39	61
2	38	62
3	37	63
4	37	63
5	37	63
6	35	65
7	35	65
8	35	65
9	34	66
10	34	66
11	34	66
12	34	66
13	35	65
14	34	66
15	34	66
16	34	66
17	34	66
18	33	67
19	33	67
20	33	67
21	32	68
22	32	68
23	31	69
24	31	69
25	31	69
26	30	70
27	29	71
28	28	72
29	28	72
30	28	72
31	28	72

Chance of precipitation in August

Any precipitation

Lahti gets around 68 mm of rain over 11.7 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 40% on the wettest days.

	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 (%)	37	37	37	37	37	37	38	38	38	38	39	39	39	40	40	40	40	40	40	39	39	39	38	38	37	37	36	36	35	35	34

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

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 65% 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 (%)	52	53	53	54	56	57	58	59	61	62	63	63	65	65	66	67	67	67	68	69	69	69	70	71	72	73	74	75	77	78	79
Comfortable (%)	35	35	35	35	34	34	34	34	33	33	32	32	31	31	30	30	30	30	29	29	29	29	28	27	27	26	25	24	22	21	20
Humid (%)	12	11	11	10	9	8	7	6	6	5	5	5	4	4	4	3	3	3	3	2	2	2	2	2	1	1	1	1	1	1	1
Muggy (%)	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	52	35	12	1
2	53	35	11	1
3	53	35	11	1
4	54	35	10	1
5	56	34	9	1
6	57	34	8	1
7	58	34	7	1
8	59	34	6	1
9	61	33	6	0
10	62	33	5	0
11	63	32	5	0
12	63	32	5	0
13	65	31	4	0
14	65	31	4	0
15	66	30	4	0
16	67	30	3	0
17	67	30	3	0
18	67	30	3	0
19	68	29	3	0
20	69	29	2	0
21	69	29	2	0
22	69	29	2	0
23	70	28	2	0
24	71	27	2	0
25	72	27	1	0
26	73	26	1	0
27	74	25	1	0
28	75	24	1	0
29	77	22	1	0
30	78	21	1	0
31	79	20	1	0

Wind in August

Winds average 10 km/h in August.

Across August, daily wind ranges from about 10 km/h on the calmest days to 11 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)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

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

Sunrise & sunset in August

DaylightNight

Daylight runs from about 16 h 54 min at the start of August to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 168 minutes over August. Sunrise moves from 3:58 AM to 5:14 AM, and sunset from 8:49 PM to 7:20 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)	16.9	16.8	16.7	16.6	16.5	16.4	16.3	16.2	16.2	16.1	16.0	15.9	15.8	15.7	15.6	15.5	15.4	15.3	15.2	15.1	15.1	15.0	14.9	14.8	14.7	14.6	14.5	14.4	14.3	14.2	14.1
Sunrise (AM)	3:58	4:00	4:03	4:05	4:08	4:10	4:13	4:15	4:18	4:20	4:23	4:26	4:28	4:31	4:33	4:36	4:38	4:41	4:44	4:46	4:49	4:51	4:54	4:56	4:59	5:02	5:04	5:07	5:09	5:12	5:14
Sunset (PM)	8:49	8:46	8:44	8:41	8:39	8:36	8:33	8:30	8:27	8:25	8:22	8:19	8:16	8:13	8:10	8:07	8:04	8:01	7:58	7:55	7:52	7:49	7:46	7:43	7:39	7:36	7:33	7:30	7:27	7:24	7:20

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	16.9	3:58	8:49
2	16.8	4:00	8:46
3	16.7	4:03	8:44
4	16.6	4:05	8:41
5	16.5	4:08	8:39
6	16.4	4:10	8:36
7	16.3	4:13	8:33
8	16.2	4:15	8:30
9	16.2	4:18	8:27
10	16.1	4:20	8:25
11	16.0	4:23	8:22
12	15.9	4:26	8:19
13	15.8	4:28	8:16
14	15.7	4:31	8:13
15	15.6	4:33	8:10
16	15.5	4:36	8:07
17	15.4	4:38	8:04
18	15.3	4:41	8:01
19	15.2	4:44	7:58
20	15.1	4:46	7:55
21	15.1	4:49	7:52
22	15.0	4:51	7:49
23	14.9	4:54	7:46
24	14.8	4:56	7:43
25	14.7	4:59	7:39
26	14.6	5:02	7:36
27	14.5	5:04	7:33
28	14.4	5:07	7:30
29	14.3	5:09	7:27
30	14.2	5:12	7:24
31	14.1	5:14	7:20

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.79 kWh/m².

For context, solar energy here swings from a low near 0.12 kWh/m² to a high of 5.28 kWh/m² in June across the year — August's 3.79 kWh/m² falls in the middle.

	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)	4.5	4.5	4.5	4.4	4.4	4.3	4.3	4.2	4.2	4.1	4.0	4.0	3.9	3.9	3.8	3.8	3.7	3.7	3.6	3.6	3.5	3.5	3.4	3.3	3.3	3.2	3.2	3.1	3.0	3.0	2.9
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.5	Bright
2	4.5	Bright
3	4.5	Bright
4	4.4	Bright
5	4.4	Bright
6	4.3	Bright
7	4.3	Bright
8	4.2	Bright
9	4.2	Bright
10	4.1	Bright
11	4.0	Bright
12	4.0	Bright
13	3.9	Moderate
14	3.9	Moderate
15	3.8	Moderate
16	3.8	Moderate
17	3.7	Moderate
18	3.7	Moderate
19	3.6	Moderate
20	3.6	Moderate
21	3.5	Moderate
22	3.5	Moderate
23	3.4	Moderate
24	3.3	Moderate
25	3.3	Moderate
26	3.2	Moderate
27	3.2	Moderate
28	3.1	Moderate
29	3.0	Moderate
30	3.0	Moderate
31	2.9	Moderate

Planning a trip in August

Is August a good time to visit Lahti?

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

5.8

Sightseeing

2nd-best month of the year

2.9

Beach & pool

2nd-best month of the year

August is a reasonable time to visit Lahti for sightseeing.

What to pack for Lahti in August

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

In August, Lahti sees daytime highs around 20°C and nights near 12°C. Worth packing: rain gear. About 12 days see rain.

rain gear

UV index in Lahti in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Lahti peaks around June 19 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

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

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

Location & terrain

Where is Lahti?

Lahti sits at 61.0°N, 25.7°E, 105 m above sea level, in Finland. The nearest listed city is Hollola, 9.0 km away.

Topography around Lahti

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

Within 3 km, the terrain around Lahti has only modest variations in elevation — a maximum elevation change of 91 m around an average of 104 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 164 m; within 80 km, only modest variations in elevation — a maximum elevation change of 226 m.

The land around Lahti is covered by trees (51%) and artificial surfaces (35%) within 3 km, trees (65%) within 16 km, and trees (71%) within 80 km.

3 km

91 m

trees 51%

16 km

164 m

trees 65%

80 km

226 m

trees 71%

treesgrasslandcroplandartificial surfaceswater

← July Lahti year-round climate September →Best places to visit in August

August weather nearby: Hollola 9.0 km · Orimattila 20 km · Heinola 32 km · Mäntsälä 43 km · Riihimäki 55 km · Kouvola 58 km · Hyvinge 58 km · Janakkala 58 km

Finland travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 85% of US; price level, 2025
GDP per capita: $56,149; 2025
Happiness: 7.8 / 10; World Happiness, 2025
Safe drinking water: 100%; of population, 2024
Homicide rate: 1; per 100k, 2023
Road deaths: 3.9; per 100k/yr, 2019
Income group: High; World Bank
English: Very high; EF EPI 603
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 Lahti (60.9827°, 25.6615°, elevation 105 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	22	13
2	22	13
3	21	13
4	21	13
5	21	13
6	21	13
7	21	13
8	21	13
9	21	12
10	21	12
11	21	12
12	20	12
13	20	12
14	20	12
15	20	12
16	20	12
17	20	12
18	20	11
19	19	11
20	19	11
21	19	11
22	19	11
23	19	11
24	19	11
25	18	11
26	18	11
27	18	10
28	18	10
29	18	10
30	18	10
31	17	10

	Clearer (%)	Cloudier (%)
1	39	61
2	38	62
3	37	63
4	37	63
5	37	63
6	35	65
7	35	65
8	35	65
9	34	66
10	34	66
11	34	66
12	34	66
13	35	65
14	34	66
15	34	66
16	34	66
17	34	66
18	33	67
19	33	67
20	33	67
21	32	68
22	32	68
23	31	69
24	31	69
25	31	69
26	30	70
27	29	71
28	28	72
29	28	72
30	28	72
31	28	72

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	52	35	12	1
2	53	35	11	1
3	53	35	11	1
4	54	35	10	1
5	56	34	9	1
6	57	34	8	1
7	58	34	7	1
8	59	34	6	1
9	61	33	6	0
10	62	33	5	0
11	63	32	5	0
12	63	32	5	0
13	65	31	4	0
14	65	31	4	0
15	66	30	4	0
16	67	30	3	0
17	67	30	3	0
18	67	30	3	0
19	68	29	3	0
20	69	29	2	0
21	69	29	2	0
22	69	29	2	0
23	70	28	2	0
24	71	27	2	0
25	72	27	1	0
26	73	26	1	0
27	74	25	1	0
28	75	24	1	0
29	77	22	1	0
30	78	21	1	0
31	79	20	1	0

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

	Clearer (%)	Cloudier (%)
1	39	61
2	38	62
3	37	63
4	37	63
5	37	63
6	35	65
7	35	65
8	35	65
9	34	66
10	34	66
11	34	66
12	34	66
13	35	65
14	34	66
15	34	66
16	34	66
17	34	66
18	33	67
19	33	67
20	33	67
21	32	68
22	32	68
23	31	69
24	31	69
25	31	69
26	30	70
27	29	71
28	28	72
29	28	72
30	28	72
31	28	72

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	52	35	12	1
2	53	35	11	1
3	53	35	11	1
4	54	35	10	1
5	56	34	9	1
6	57	34	8	1
7	58	34	7	1
8	59	34	6	1
9	61	33	6	0
10	62	33	5	0
11	63	32	5	0
12	63	32	5	0
13	65	31	4	0
14	65	31	4	0
15	66	30	4	0
16	67	30	3	0
17	67	30	3	0
18	67	30	3	0
19	68	29	3	0
20	69	29	2	0
21	69	29	2	0
22	69	29	2	0
23	70	28	2	0
24	71	27	2	0
25	72	27	1	0
26	73	26	1	0
27	74	25	1	0
28	75	24	1	0
29	77	22	1	0
30	78	21	1	0
31	79	20	1	0

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

	Clearer (%)	Cloudier (%)
1	39	61
2	38	62
3	37	63
4	37	63
5	37	63
6	35	65
7	35	65
8	35	65
9	34	66
10	34	66
11	34	66
12	34	66
13	35	65
14	34	66
15	34	66
16	34	66
17	34	66
18	33	67
19	33	67
20	33	67
21	32	68
22	32	68
23	31	69
24	31	69
25	31	69
26	30	70
27	29	71
28	28	72
29	28	72
30	28	72
31	28	72

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	52	35	12	1
2	53	35	11	1
3	53	35	11	1
4	54	35	10	1
5	56	34	9	1
6	57	34	8	1
7	58	34	7	1
8	59	34	6	1
9	61	33	6	0
10	62	33	5	0
11	63	32	5	0
12	63	32	5	0
13	65	31	4	0
14	65	31	4	0
15	66	30	4	0
16	67	30	3	0
17	67	30	3	0
18	67	30	3	0
19	68	29	3	0
20	69	29	2	0
21	69	29	2	0
22	69	29	2	0
23	70	28	2	0
24	71	27	2	0
25	72	27	1	0
26	73	26	1	0
27	74	25	1	0
28	75	24	1	0
29	77	22	1	0
30	78	21	1	0
31	79	20	1	0