I recall one from some RQ2 supplement, maybe the RQ Companion, but it wasn't particularly good, and as I recall it resulted in Glorantha having very bad weather overall.
Though not officially described this way, I have for a long time now based the weather on the week and day (and of course season). Windsday in Movement Week is likely to be brisk (especially in Storm season). I roll a d6, on a 1-2 I base the weather on the week, on a 3-4 I base it on the day, and on a 5-6 it is unrelated to the date (I often roll another d6 to determine which other day of the week to base it on).
This system is so there is a relationship between the runic powers behind the calender and the weather without making the weather totally predictable. Some days, such as Windsday during Stasis Week, represent a minor cosmic struggle behind the weather.
Of course this only really works where the Theyalan Calender is used.