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Best time to visit · Germany
For the most comfortable weather in Koblenz, aim for May – September. September tops our comfort score at 87/100, with highs around 70°F (21°C) and 2.3 in (58 mm) of rain. April and October are good shoulder-season months. The toughest months are December – February, mainly because of cool days.
Highs run from 40°F to 79°F across the year, and the yearly total is about 30.9 in (786 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 40°F4°C | 42°F6°C | 50°F10°C | 60°F15°C | 67°F19°C | 74°F23°C | 79°F26°C | 78°F26°C | 70°F21°C | 59°F15°C | 48°F9°C | 41°F5°C |
| Avg low | 30°F-1°C | 30°F-1°C | 34°F1°C | 41°F5°C | 48°F9°C | 55°F13°C | 58°F15°C | 58°F14°C | 50°F10°C | 44°F7°C | 38°F3°C | 32°F0°C |
| Rain | 2.8 in70 mm | 2.2 in57 mm | 2.2 in57 mm | 1.9 in47 mm | 2.8 in71 mm | 2.8 in70 mm | 3.0 in75 mm | 3.0 in76 mm | 2.3 in58 mm | 2.4 in60 mm | 2.7 in69 mm | 3.0 in76 mm |
| Humidity | 94% | 91% | 86% | 79% | 78% | 74% | 68% | 69% | 74% | 86% | 93% | 95% |
| Cloud | 79% | 76% | 70% | 66% | 71% | 71% | 68% | 67% | 64% | 71% | 79% | 81% |
| Comfort | 40 | 45 | 61 | 79 | 83 | 83 | 83 | 83 | 87 | 75 | 53 | 40 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. Temperatures were adjusted from the grid cell's ~294 m (965 ft) to Koblenz's ~78 m (256 ft) elevation using the standard lapse rate of 6.5°C per 1,000 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The cold peaks here: highs of 40–42°F (4–6°C), and nights reach 30°F (-1°C). About 8.0 in (203 mm) of rain falls across these months, 26% of the year's total. Nights dip below freezing in January & February. Comfort scores bottom out in December – February; the season averages 42/100.
Temperatures climb through the season, from 50°F highs in March to 67°F by May. It's the driest season, with only about 6.9 in (175 mm) of rain, 22% of the year's total. Lows bottom out around 34°F (1°C). May is among the best-scoring months (season average 74/100).
Peak warmth: highs of 74–79°F (23–26°C). It's the wettest season, with about 8.7 in (221 mm) of rain, 28% of the year's total. Lows bottom out around 55°F (13°C). Comfort peaks here: June – August rank with the year's best, and the season averages 83/100.
Temperatures slide from 70°F highs in September to 48°F by November. About 7.4 in (187 mm) of rain falls across these months, 24% of the year's total. Lows bottom out around 38°F (3°C). September is among the best-scoring months (season average 72/100).
By comfort score: 7 Great, 1 Good, 2 Fair and 2 Tough. Great months: April – October. Tap a month for its own guide.
For the most comfortable weather in Koblenz, aim for May – September. September tops our comfort score at 87/100, with highs around 70°F (21°C) and 2.3 in (58 mm) of rain. April and October are good shoulder-season months. The toughest months are December – February, mainly because of cool days.
August is the wettest month, averaging about 3.0 in (76 mm) of rain. April is the driest, with about 1.9 in (47 mm). The yearly total is around 30.9 in (786 mm).
January is the coldest, with average lows of 30°F (-1°C) and highs of 40°F (4°C). The warmest is July, with average highs of 79°F (26°C).
Not very: summer (June – August) humidity averages 70%, and highs peak around 79°F (26°C), so it rarely feels sticky.
On average, yes: lows fall below 32°F (0°C) in January & February, bottoming out around 30°F (-1°C) in January.
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