Month by month
Udzungwa in October
October is the month most sources call Udzungwa's hottest, and the park itself is still dry, with rain at just 26 mm over 2 days while the heat builds toward its yearly peak.
If you only want the answer
October gives you dry trails and real heat together, a combination worth planning around with an early start and extra water, and it is worth knowing that two published sources do not fully agree on exactly how hot it gets.
Dry, hot, and a small disagreement worth flagging
TANAPA's own brochure names October as Udzungwa's hottest month, at around 31°C. The thirty-year Open-Meteo normal used on this site puts October's day high at 29.1°C, and shows November running very slightly hotter still, at 29.8°C. Both figures describe genuine heat; they simply do not agree on which single month wins, and this page prints the Open-Meteo number because it comes from the only source with a full twelve-month dataset behind it.
What both sources agree on is more useful than the exact degree: October is dry and hot, with rain still down at 26 mm over just 2 days, tied with September for the fewest rain days of the year, and the short rains that will end this dry spell have not yet arrived.
Walking in October's heat
The trails themselves are as firm as they get, with the caution reserved for the long rains months away and no restriction on Sanje's upper tiers or the plateau routes. The heat is the real variable to manage: nights stay relatively warm at 18.4°C, so there is less overnight recovery than in June or July, and the climb up Sanje's exposed sections is genuinely harder in October's afternoon sun than in a cooler dry-season month.
Carry more than the standard two litres of water per person if you are attempting anything beyond the short walks near headquarters, and lean on your guide's early start rather than pushing it back for a cooler-looking morning that October rarely delivers.
What's coming next
October is also the last full month before the short rains arrive in November, so if firm, dry trails matter more to you than avoiding the heat, this is your last clean window before conditions start to shift. As always, a guide is assigned on the day at Mang'ula, with no advance booking needed beyond special campsites and any multi-day trek.