May at the Brussels Uccle site of the RMI - the Belgian Met. Office.

See http://cirrus.oma.be/english/index.php?menu=Menu1_3_3 Monthly
summary

1st column - May 2004
2nd column - long-term average

Mean max. temp. 17.1°C 17.2°C
Mean min. temp. 8.3°C 8.3°C
Mean temp. 12.8°C 12.7°C

Rainfall 40.8 mm 61.6 mm
Rainfall days 11 15

Sunshine 216 hr 20 min 199 hr

Colin Youngs
Brussels