Flow
34.4 m³/s
+0.8 m³/s · very slow
Updated 19 Jul 2026, 13:14
Water avg
25.3 °C
-0.1 °C · -0.2 °C
Air
22.4 °C
Feels 24.5 °C · UV 6.7
Rain
0.0 mm
Next 2h 0.0 mm · Probability 25%
Water temperature
Zch. KW Letten
25.5 °C
24h avg 25.6 · min/max 25.4 / 25.9
KW Dietikon
25.1 °C
24h avg 25.1 · min/max 24.5 / 26.5
Station gap
+0.4 °C
6-day range
24.1–25.7 °C
Yesterday delta
-0.2 °C
Thresholds
comfortable
< 21 cold21+ comfortable
Flow and timing
Current flow
34.4 m³/s
24h avg 33.7 · min/max 31.8 / 34.6
6-day range
36.6–34.4 m³/s
Yesterday delta
+1.7 m³/s
Thresholds
very slow
< 50 very slow50–80 slow80–100 best100–130 fast> 130 avoid
Ring
~2 h 25–2 h 45+
Boat
~2 h 25–2 h 45+
Weekend total
~2 h 25–2 h 45+
Weather facts
Air / Feels
22.4 / 24.5 °C
Wind / gusts
4 / 12 km/h
Cloud cover
2%
Rain now / 2h
0.0 / 0.0 mm
Storm risk
low
UV now / max
6.7 / 6.9
Recent daily ranges
Water at Letten
12 Jul24.1–24.1 °C
13 Jul24.1–25.1 °C
14 Jul25.0–25.7 °C
15 Jul25.4–25.6 °C
17 Jul25.8–26.2 °C
18 Jul25.3–25.9 °C
19 Jul25.4–25.7 °C
Flow at Unterhard
12 Jul36.6–37.1 m³/s
13 Jul36.3–37.1 m³/s
14 Jul36.2–38.4 m³/s
15 Jul36.4–38.5 m³/s
17 Jul32.7–33.3 m³/s
18 Jul31.0–33.3 m³/s
19 Jul31.8–34.4 m³/s