Weather update client in Clojure

(ns wuclient
(:refer-clojure :exclude [send])
(:use [zhelpers :as mq])
(:import [java.util StringTokenizer]))

;;
;; Weather update client
;; Connects SUB socket to tcp://localhost:5556
;; Collects weather updates and finds avg temp in zipcode
;;
;; Isaiah Peng <moc.liamg|airassi#moc.liamg|airassi>
;;

(def total-temp (atom 0))

(defn -main [& args]
(let [subscriber (-> 1 mq/context (mq/socket mq/sub))
filter (or (first args) "10001 ")
args-temp (atom 0)
nbr 100]
(println "Collecting updates from weather server for " filter)
(mq/connect subscriber "tcp://localhost:5556")
(mq/subscribe subscriber filter)
(dotimes [i nbr]
(let [string (mq/recv-str subscriber)
sscanf (StringTokenizer. string " ")
zipcode (Integer/parseInt (.nextToken sscanf))
temperature (Integer/parseInt (.nextToken sscanf))
relhumidity (Integer/parseInt (.nextToken sscanf))]
(swap! total-temp #(+ % temperature))
(println (str "received: " string))))
(println (str "Average temperature for zipcode '" filter "' was " (int (/ @total-temp nbr))))))