Kalach-na-Donu weather in April

In April, Kalach-na-Donu sees average daytime highs of 15°C and overnight lows near 5°C, with 30 mm of precipitation across 6.9 wet days and about 13.4 hours of daylight. It is the 6th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 11°C in the first days to 18°C by the end. The sky is clear or mostly clear about 27% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 30 min at the start of April to 14 h 12 min by month's end. Set against the rest of the year, April is Kalach-na-Donu's 7th-clearest and 5th-windiest month. For the whole year in context, see Kalach-na-Donu's year-round climate.

Daytime high: 15°; 6th warmest
Overnight low: 5°; 6th coldest
Precipitation: 30 mm; 6.9 wet days
Daylight: 13 h 24 min; 5:23 AM – 6:49 PM
Cloud cover: 63%; 7th clearest
Wind: 14 km/h; 5th windiest
Solar energy: 4.62 kWh/m²
Travel score: 4.6; out of 10

Kalach-na-Donu is human settlement in Kalachyovsky District, Volgograd Oblast, Russia.

Density: 1,529/km²; people per km²
Founded: 1708

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

← March Kalach-na-Donu year-round climate May →Best places to visit in April

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 11°C in the first days to 18°C by the end.

A typical April day in Kalach-na-Donu reaches about 15°C in the afternoon and slips back to 5°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 21°C. Set against its neighbours, April runs about 10°C warmer than March and about 7°C cooler than May.

	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
Avg high (°C)	10	10	11	11	12	12	12	13	13	13	14	14	14	15	15	15	15	16	16	16	16	17	17	17	17	18	18	18	18	19
Avg low (°C)	1	1	1	2	2	2	3	3	3	3	4	4	4	4	5	5	5	5	6	6	6	6	6	7	7	7	7	7	8	8

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

How April really feels in Kalach-na-Donu

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 10 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

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Kalach-na-Donu weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 9th-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°	36	8.9	8.1	8.5	0.0
Feb	-2° / -8°	29	7.3	6.1	9.8	0.0
Mar	5° / -3°	35	8.7	4.7	11.6	0.4
Apr	15° / 5°	30	6.9	0.5	13.4	4.6
May	22° / 11°	39	7.6	0	15	7.1
Jun	27° / 16°	35	7.3	0	15.9	6.8
Jul	30° / 18°	31	6.3	0	15.5	5.8
Aug	29° / 17°	22	4.3	0	14.2	6.6
Sep	22° / 11°	31	5.8	0	12.4	7.3
Oct	13° / 5°	34	6.9	0.4	10.5	4.1
Nov	4° / -2°	28	6.3	2.4	9	0.3
Dec	-1° / -6°	39	8.7	6.3	8.1	0.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 61%.

	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
Clearer (%)	36	36	36	36	36	36	36	36	36	36	37	37	37	37	37	37	38	39	40	41	42	43	43	44	44	45	45	46	46	46
Cloudier (%)	64	64	64	64	64	64	64	64	64	64	63	63	63	63	63	63	62	61	60	59	58	57	57	56	56	55	55	54	54	54

	Clearer (%)	Cloudier (%)
1	36	64
2	36	64
3	36	64
4	36	64
5	36	64
6	36	64
7	36	64
8	36	64
9	36	64
10	36	64
11	37	63
12	37	63
13	37	63
14	37	63
15	37	63
16	37	63
17	38	62
18	39	61
19	40	60
20	41	59
21	42	58
22	43	57
23	43	57
24	44	56
25	44	56
26	45	55
27	45	55
28	46	54
29	46	54
30	46	54

Chance of precipitation in April

Any precipitationSnow

Kalach-na-Donu gets around 30 mm of rain and snow over 6.9 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 24% and peaks near 27% on the wettest days, and about 1 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
Rain chance (%)	27	27	26	26	25	25	24	24	24	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	22	22	22
Snow chance (%)	7	7	6	5	5	4	3	3	3	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	0	0	0

	Rain chance (%)	Snow chance (%)
1	27	7
2	27	7
3	26	6
4	26	5
5	25	5
6	25	4
7	24	3
8	24	3
9	24	3
10	23	2
11	23	2
12	23	2
13	23	2
14	23	2
15	23	2
16	23	2
17	23	1
18	23	1
19	23	1
20	23	1
21	23	1
22	23	1
23	23	1
24	23	1
25	23	1
26	22	1
27	22	1
28	22	0
29	22	0
30	22	0

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 100% 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
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	99
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	99	1

Wind in April

Winds average 14 km/h in April.

Across April, daily wind ranges from about 13 km/h on the calmest days to 15 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
Wind speed (km/h)	15	15	15	15	15	15	15	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	13	13	13	13	13	13
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 30 min at the start of April to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 102 minutes over April. Sunrise moves from 5:55 AM to 4:56 AM, and sunset from 6:27 PM to 7:10 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
Daylight (h)	12.5	12.6	12.7	12.7	12.8	12.8	12.9	13.0	13.0	13.1	13.1	13.2	13.3	13.3	13.4	13.4	13.5	13.6	13.6	13.7	13.7	13.8	13.8	13.9	14.0	14.0	14.1	14.1	14.2	14.2
Sunrise (AM)	5:55	5:52	5:50	5:48	5:46	5:44	5:42	5:40	5:38	5:35	5:33	5:31	5:29	5:27	5:25	5:23	5:21	5:19	5:17	5:15	5:13	5:11	5:09	5:07	5:06	5:04	5:02	5:00	4:58	4:56
Sunset (PM)	6:27	6:28	6:30	6:31	6:33	6:34	6:36	6:37	6:39	6:40	6:42	6:43	6:45	6:46	6:48	6:49	6:51	6:52	6:54	6:55	6:57	6:58	7:00	7:01	7:03	7:04	7:06	7:07	7:09	7:10

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.5	5:55	6:27
2	12.6	5:52	6:28
3	12.7	5:50	6:30
4	12.7	5:48	6:31
5	12.8	5:46	6:33
6	12.8	5:44	6:34
7	12.9	5:42	6:36
8	13.0	5:40	6:37
9	13.0	5:38	6:39
10	13.1	5:35	6:40
11	13.1	5:33	6:42
12	13.2	5:31	6:43
13	13.3	5:29	6:45
14	13.3	5:27	6:46
15	13.4	5:25	6:48
16	13.4	5:23	6:49
17	13.5	5:21	6:51
18	13.6	5:19	6:52
19	13.6	5:17	6:54
20	13.7	5:15	6:55
21	13.7	5:13	6:57
22	13.8	5:11	6:58
23	13.8	5:09	7:00
24	13.9	5:07	7:01
25	14.0	5:06	7:03
26	14.0	5:04	7:04
27	14.1	5:02	7:06
28	14.1	5:00	7:07
29	14.2	4:58	7:09
30	14.2	4:56	7:10

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.62 kWh/m².

For context, solar energy here swings from a low near 0.75 kWh/m² to a high of 6.22 kWh/m² in June across the year — April's 4.62 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
Solar energy (kWh/m²)	4.0	4.0	4.1	4.1	4.2	4.2	4.2	4.3	4.3	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.9	4.9	5.0	5.0	5.0	5.1	5.1	5.2	5.2	5.2
Level	Moderate	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	4.0	Moderate
2	4.0	Bright
3	4.1	Bright
4	4.1	Bright
5	4.2	Bright
6	4.2	Bright
7	4.2	Bright
8	4.3	Bright
9	4.3	Bright
10	4.4	Bright
11	4.4	Bright
12	4.5	Bright
13	4.5	Bright
14	4.5	Bright
15	4.6	Bright
16	4.6	Bright
17	4.7	Bright
18	4.7	Bright
19	4.8	Bright
20	4.8	Bright
21	4.9	Bright
22	4.9	Bright
23	5.0	Bright
24	5.0	Bright
25	5.0	Bright
26	5.1	Bright
27	5.1	Bright
28	5.2	Bright
29	5.2	Bright
30	5.2	Bright

Planning a trip in April

Is April a good time to visit Kalach-na-Donu?

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

4.6

Sightseeing

6th-best month of the year

0.7

Beach & pool

6th-best month of the year

April is a reasonable time to visit Kalach-na-Donu for sightseeing.

What to pack for Kalach-na-Donu in April

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

In April, Kalach-na-Donu sees daytime highs around 15°C and nights near 5°C. Worth packing: a warm layer and sun protection. About 7 days see rain.

a warm layersun protection

UV index in Kalach-na-Donu in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Kalach-na-Donu peaks around July 12 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (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	2	2	5	5	7	7	5	5	3	1	1
Level	Low	Low	Moderate	Moderate	Moderate	High	Very high	High	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Low
Mar	2	Moderate
Apr	5	Moderate
May	5	Moderate
Jun	7	High
Jul	7	Very high
Aug	5	High
Sep	5	High
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Air quality in Kalach-na-Donu in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Kalach-na-Donu is worst in March — around 18 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (June, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	10	11	18	11	9	8	9	9	8	9	10	9
Level	Good	Good	Moderate	Good	Good	Good	Good	Good	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	10	Good
Feb	11	Good
Mar	18	Moderate
Apr	11	Good
May	9	Good
Jun	8	Good
Jul	9	Good
Aug	9	Good
Sep	8	Good
Oct	9	Good
Nov	10	Good
Dec	9	Good

Location & terrain

Where is Kalach-na-Donu?

Kalach-na-Donu sits at 48.7°N, 43.5°E, 41 m above sea level, in Russia. The nearest listed city is Surovikino, 50 km away.

Topography around Kalach-na-Donu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kalach-na-Donu.

Within 3 km, the terrain around Kalach-na-Donu has only modest variations in elevation — a maximum elevation change of 122 m around an average of 49 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 152 m; within 80 km, significant variations in elevation — a maximum elevation change of 265 m.

The land around Kalach-na-Donu is covered by grassland (31%), trees (28%) and artificial surfaces (27%) within 3 km, grassland (41%) and cropland (32%) within 16 km, and cropland (50%) and grassland (40%) within 80 km.

3 km

122 m

grassland 31%

16 km

152 m

grassland 41%

80 km

265 m

cropland 50%

treesgrasslandcroplandartificial surfaceswaterwetland

← March Kalach-na-Donu year-round climate May →Best places to visit in April

April weather nearby: Surovikino 50 km · Gorodishche 71 km · Volgograd 71 km · Volzhsky 93 km · Dubovka 104 km · Frolovo 120 km · Kotel’nikovo 121 km · Leninsk 123 km

Russia travel facts

Travel advisory: Level 4; Do Not Travel
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 32% of US; price level, 2025
GDP per capita: $17,547; 2025
Happiness: 5.8 / 10; World Happiness, 2025
Safe drinking water: 76%; of population, 2024
Homicide rate: 6.8; per 100k, 2021
Road deaths: 12; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 521
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 Kalach-na-Donu (48.691°, 43.5264°, elevation 41 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. 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).

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

	Clearer (%)	Cloudier (%)
1	36	64
2	36	64
3	36	64
4	36	64
5	36	64
6	36	64
7	36	64
8	36	64
9	36	64
10	36	64
11	37	63
12	37	63
13	37	63
14	37	63
15	37	63
16	37	63
17	38	62
18	39	61
19	40	60
20	41	59
21	42	58
22	43	57
23	43	57
24	44	56
25	44	56
26	45	55
27	45	55
28	46	54
29	46	54
30	46	54

	Rain chance (%)	Snow chance (%)
1	27	7
2	27	7
3	26	6
4	26	5
5	25	5
6	25	4
7	24	3
8	24	3
9	24	3
10	23	2
11	23	2
12	23	2
13	23	2
14	23	2
15	23	2
16	23	2
17	23	1
18	23	1
19	23	1
20	23	1
21	23	1
22	23	1
23	23	1
24	23	1
25	23	1
26	22	1
27	22	1
28	22	0
29	22	0
30	22	0

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	99	1

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

	Clearer (%)	Cloudier (%)
1	36	64
2	36	64
3	36	64
4	36	64
5	36	64
6	36	64
7	36	64
8	36	64
9	36	64
10	36	64
11	37	63
12	37	63
13	37	63
14	37	63
15	37	63
16	37	63
17	38	62
18	39	61
19	40	60
20	41	59
21	42	58
22	43	57
23	43	57
24	44	56
25	44	56
26	45	55
27	45	55
28	46	54
29	46	54
30	46	54

	Rain chance (%)	Snow chance (%)
1	27	7
2	27	7
3	26	6
4	26	5
5	25	5
6	25	4
7	24	3
8	24	3
9	24	3
10	23	2
11	23	2
12	23	2
13	23	2
14	23	2
15	23	2
16	23	2
17	23	1
18	23	1
19	23	1
20	23	1
21	23	1
22	23	1
23	23	1
24	23	1
25	23	1
26	22	1
27	22	1
28	22	0
29	22	0
30	22	0

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	99	1

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

	Clearer (%)	Cloudier (%)
1	36	64
2	36	64
3	36	64
4	36	64
5	36	64
6	36	64
7	36	64
8	36	64
9	36	64
10	36	64
11	37	63
12	37	63
13	37	63
14	37	63
15	37	63
16	37	63
17	38	62
18	39	61
19	40	60
20	41	59
21	42	58
22	43	57
23	43	57
24	44	56
25	44	56
26	45	55
27	45	55
28	46	54
29	46	54
30	46	54

	Rain chance (%)	Snow chance (%)
1	27	7
2	27	7
3	26	6
4	26	5
5	25	5
6	25	4
7	24	3
8	24	3
9	24	3
10	23	2
11	23	2
12	23	2
13	23	2
14	23	2
15	23	2
16	23	2
17	23	1
18	23	1
19	23	1
20	23	1
21	23	1
22	23	1
23	23	1
24	23	1
25	23	1
26	22	1
27	22	1
28	22	0
29	22	0
30	22	0

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	99	1